It just feels impolite to me to not refer to people by their gender. Is it that upsetting to give people their name and gender? What right of yours does this infringe?
What's impolite is demanding I conform to your view and forcing me to learn some words you made up and use them every time we speak.
And again, it's a self-applied label.
Don't force me to use your made up words, I won't tell you what to do with your life.
ps- I grew up in the 80s when gay and trans people were very much oppressed, unlike now. I stood up for their rights, got in actual fights for them on several occasions. And now im called CIS scum for being a straight male.
I have family members I've had to stand with against other family members because they were gay. I love them dearly and even to them I say 'I respect your liberties, please respect mine'.