Even if there was so contingent of people who aren't really trans (whatever that's supposed to mean), who cares. Just let people live their lives. Not sure why the continued maintenance of rigid gender roles is so important to so many people here
As I've said before, suggesting that how someone dresses and behaves determines that person's gender is actually what maintains rigid gender roles.
Good thing nobody says that?
Then what then does determine gender?
A man is someone who identifies as a man. A woman is someone who identifies as a woman
If that was all there was to it it would be an empty concept and there'd be no reason anyone would be upset about being misgendered.
Also it just drifts into nonsensical territory. For a concept to exist there has to be a manifestation of the concept. Even for imaginary things there is a definition of what it would be if it existed. Saying a man is someone who identifies as a man is circular reasoning and doesn't answer the question.
Gender is an empty concept, correct, and it is nonsense. If everyone understood gender as it actually existed, it would not exist. Unfortunately, we've spent millennia building rigid definitions around them with no basis, and anything that is a threat to those rigid definitions is going to be hard for most people who grew up in such a society to accept
It's also not circular reasoning any more than it's circular reasoning to define Republican as someone who identifies with the Republican party