From the comments on the post originally linked and quoted by @LostInCalifornia .

Someone asked, if QT insists that all these words are essentially meaningless and arbitrary (man, woman, etc), then why do they insist that getting the words right is paramount, and that misgendering is violence.

The response from Ceri Black is very good, and I want to share it here.

This is a great question. It actually goes to the heart of what queer theory is about.

When they are saying “I’m trans,” they are in that very moment, doing praxis. They are breaking binaries, they are performing queer praxis.

If you, boring old you, do not recognise their transgression for what they think it is, a brave attempt to queer binaries, then you are striking at the heart of their praxis. You are denying that their transgression has the effect that it intends. You are invalidating their existence, because their identity isn’t made of anything so mundane as their physical body, or their good deeds, or anything like that. It’s made up, in that moment, of their trans-gression, which you are essentially saying “don’t be silly” about.

It’s not that the words don’t really mean anything - it’s that they mean EVERYTHING, if that makes sense. There’s nothing outside the binaries and the words that structure thought.

Apparently.

https://ceriblack.substack.com/p/queer-praxis/comment/11448532