Let's see what we have; just give your opinion, let's start with some facts, hm?
Transgender - "An adjective that isan umbrella term used to describethe full range of people whosegender identity and/or genderrole do not conform to what istypically associated with their sexassigned at birth. While the term“transgender” is commonlyaccepted, not all TGNC peopleself‐identify as transgender."
Gender - "refers to the attitudes,feelings, and behaviors that a givenculture associates with a person’sbiological sex. Behavior that iscompatible with cultural expectationsis referred to as gender-normative;behaviors that are viewed asincompatible with these expectationsconstitute gender non-conformity."
Sex - "refers to a person’s biologicalstatus and is typically categorized asmale, female, or intersex (i.e., atypicalcombinations of features that usuallydistinguish male from female). Thereare a number of indicators ofbiological sex, including sexchromosomes, gonads, internal reproductive organs, and external genitalia"
This should clear up a common misconception, no, sex and gender do not refer to the same thing. As such any arguments using or referring to the definition of sex as a stand-in for gender is inherently a strawman and fallacious.
Here's a little introductory information for those new to the concept, explained in better words than I could write:
"People who defy gender norms have existed in every culture throughout time. However, the term “transgender” is relatively new, dating to the mid-1990s. Often, transgender people are not well understood by the general population. It is useful to think of the word “transgender” as an umbrella term that encompasses a number of people who live substantial portions of their lives expressing an innate sense of gender other than their sex assigned at birth. This includes transsexuals, cross-dressers and people who feel like their biological sex fails to reflect their true gender. People who do not identify as transgender can be called “cisgender,” meaning that they identify with the sex assigned at birth.Some transgender people report feeling that they were born in the wrong body. For this reason, some transgender people choose to have surgery to take the physical form of their desired sex. This person is sometimes called a post-operative transsexual. Someone can also be pre-operative, or can choose never to have surgery (in this case, she or he might be known as “non-op”). Hormones are used to promote secondary sex characteristics, such as breast tissue or facial hair. Often, the word “transitioning” is used to describe the period of moving away from one’s assigned sex. Physical transitioning may describe surgical, hormonal, or other changes to one’s body. Socially transitioning may describe legally changing one’s name, asking friends to use a chosen pronoun, and other acts of disclosure.If specifying that someone is trans is necessary (although it usually isn’t), the following terminology should be used: someone who formerly identified as a woman and who now identifies as a man is known as a FTM (female-to-male) transsexual, a trans man, or a transgender man. Likewise, someone who formerly identified as a man and who now identifies as a woman may be labeled a MTF (male-to-female) transsexual, a trans woman, or a transgender woman. It is extremely important to remember that MTF people are women, just as FTM people are men.Addressing transgender people the way they prefer to be addressed (including chosen name and preferred pronouns) demonstrates respect. Some transgender individuals may choose to use gender-neutral pronouns, such as “ze/hir/hirs,” as in the sentence “That book is hirs. Ze brought hir favorite book.” Other pronouns are in use; the best way to find out someone’s preferred pronoun is to simply ask.
Transgender people may identify as lesbian, bisexual, gay, heterosexual, or some other sexual orientation. Having experienced discrimination, prejudice, oppression, fear and shame, they share commonalties with LGB people. Like LGB people, transgender individuals should not have to hide who they are in order to have safe and satisfying lives."
For those of you who want a first-hand explanation of being transgender:
Keith Reynolds, 18, student, SurreyA lot of people have it in their head that we wake up and decide to be trans. I want people to know that it’s not a choice. Nothing has happened in my life to make me trans. I was born trans. I told my mum when I was about 13. She was shocked and didn’t really understand. Then six months later she told my dad and he was so angry. I love my dad but he was a very traditional person. There was a lot of tension. I couldn’t wear men’s clothing, or I couldn’t wear men’s deodorant – it would cause an argument.It started to get better, but then Dad got cancer. He died a week before I turned 16. When he got sick we didn’t talk about it any more. I thought that once he had recovered we’d go back to talking about it, but he didn’t recover. After my dad died I found a book about transgender young people and I gave it to my mum. She read it and it was a complete change. She says her main thing and also my dad’s main thing is they were worried about how it will affect me in life – will I be able to find a job, will I be able to find a partner. Well, those things have happened: I’ve found a partner, I have no trouble finding jobs.My mum is fantastic, she’s really proud of me. She comes to Transgender Pride with me, if anybody says anything bad about me being trans she’s ready to hammer them. She makes me the envy of many trans people, I think. I was referred to Tavistock [the clinic for children and adolescents] in May 2014. You’re not allowed testosterone until you’ve been on hormone blockers for a year at Tavistock. But I was 16 at my first appointment and had already gone through puberty, and knew that by the time I had done a year on blockers I’d be picked up by the adult clinics. I decided not to go on hormone blockers, because it wouldn’t really do much for me. I was referred to an adult clinic in May 2015.I still haven’t had an appointment, which means I haven’t had any medical intervention in three years. I’m desperate for hormones and surgery. My dysphoria makes me feel like I’m embarrassed for people to look at me. In my head I’m this weird thing that is ugly. I have to wear baggy clothes to hide my hips, I have to think about how many layers I have to wear to hide my chest. I really understand that the NHS is overstretched because there’s a sudden influx of people being referred. I completely understand why, but that doesn’t stop the frustration.
Surat-Shaan Knan, 40s, project manager for Liberal Judaism, LondonI didn’t really know anything about gender identity until quite late, when I was in my mid-20s. I also come from a secular Jewish family, so I didn’t know much about what it means to be Jewish either. I identify as non-binary, trans-masculine. Being trans and Jewish seemed a complete oxymoron. I thought, it can’t be, I have to decide between them. But I had this wonderful community here to give me all that space and time to come out.I feel very blessed that everyone, including family and friends, have been extremely supportive throughout. I haven’t had to go through what many trans people have to go through.Years ago when I came out I went to the wall [Western Wall in Jerusalem]. There are three sections – the male section, the female section and an ungendered section. Now I would probably go to the ungendered section, but it was my first time presenting as male in such a holy place and I went to the male section of the wall. It made me so happy to do that, to go to the part of the wall I wanted to. I was transitioning medically and spiritually and it was one of the most important moments of my life.A Jewish online magazine reported on that and it sparked off online, I got really abusive messages. I thought, these people don’t know me, I don’t think anyone should be able to tell you who you are and how to live your life. Yourself is yourself, even in the religious community. A lot of people from mainstream trans communities ask me, how can you be a person of faith, because even your own religion has been so horrible to LGBT people in general and trans people specifically? That’s true. But it’s about what faith means and leaving out what some leaders and institutions do with it.In the media, the focus is often on the pathology and medical transitioning and that’s a big part of it, but there are so many layers of what it means to be trans. It’s almost like trans people are one-dimensional, they are just these people who need medical help. I do hope we will change our view on what trans looks like. It’s not just something on the outside, it’s something that’s very deep and spiritual. We are created in the image of God. I am part of that as a trans Jew.
Thank you all for your time and attention, I'm not here to argue (though I will if needed) I'm here to present information and resources to learn more. If any trans individual has anything to correct, or one simply more informed on the subject overall, I'd be glad to have the correction. Please be kind to one another in this thread, there is no need for ad hominem and such here.
Additional Resources: