So you think you have to have anger to be strict, stern, assertive, disciplinary, authoritative,firm, defensive, a leader, to have thick skin, be outspoken, convicting, moderately easygoing, moderately resistant, moderately tolerable,etc.
Do you think drill instructors are angry in boot camp?
Just because they amplify their voices, give commands, push you hard.
If this is your thought process, you haven't learned what life is without anger in the correct manner.
People that still hang on to anger trying to justify it can't see the actual reality. Believing that anger and complete peace co-exist.
It is true what they say about anger blinding you. That's why you say a lot of things you don't mean when you're angry. No peace, no clear thinking, can't see what you're doing, unaware of everything.