There is a lot of immunity; but in the US 100-150k people are catching the virus per day.
It’s not possible to say how low transmission has to be in order to appropriately reduce the risk of a vaccine avoiding variant - though I would say hospitalization rates substantial enough to harm care for Vaccinated people having non COVID health issues, and potential economic issues from long COVID are ask factors. That is all to say that it’s critical to maximize the number of people being Vaccinated.
I don’t accept the comparison with abortion; for a few general reasons.
Pregnancy, childbirth, poses a huge health, financial, time and economic burden - even in an uncomplicated pregnancy:
If the impact of pregnancy was 2 days of having a sore arm, and a 1/100000 chance of a Blood clot that you’ll probably survive - abortion would be illegal, and everyone would support that stance.
Likewise, if vaccines caused months of pain and discomfort, removal from the labour force, and substantial hormonal changes to your body - there would be no vaccine mandates.
Your forced to wear clothes to work, glasses to drive if you have vision issues - and you’re required to take medication if health issues impact your ability to drive safely.
There is a credible need in all these cases, including vaccination, being balanced against individual rights. Whether one set of rights or the other is maintained is a nuanced equation that has to be based on the situation, not some binary chest thumping absolutes.
For example, imagine airborn pandemic Ebola; mortality of 90%, but 50% vaccinations that are only 75% effective - with the same state as today. I suspect everyone would be in support of vaccine mandates.
Whether or not these vaccine mandates meet that equation of balance of rights - is a valid discussion - but I reject on principle this binary notion of rights.
That goes for everything. You should able to go in public and talk about how good you think the mandalorian is - but if doing so gave people nearby strokes I would support the police telling you to stfu about it on pain of imprisonment.