You know how I can tell that, when a person identifies as trans online, they do it for the attention?

Online you can be ANYTHING. You can be an anonymous anime cat girl avatar person and just put "woman" in your bio, AND NO ONE WOULD HAVE ANY CLUE YOU WERE TRANS IF YOU NEVER SAID ANYTHING, and you'd "pass" and people would call you after your presented identity.

You wouldn't need to flaunt your pronouns in your bio, you wouldn't need to deal with transphobes, you'd have acceptance.

And all you'd need to do is actually act like a woman, to actually talk/write like a woman, and not to mention your private medical transition information (that you shouldn't share with strangers anyway).
But you won't do it. So why not?

My theory is that it's because there's a performative aspect behind the entire thing. But I await other explanations.