Also the other thing about that JKR Asking a Random Guy About His Opinions on Kink post is that she has totally failed to clarify the core thing about proponents of the "autogynephile" theory:
Even If It Were True What Would That Change
If transness was a predominantly sexual experience - so what? It's no skin off my back. I get a sexual experience in public when I have a really good bagel, that doesnt mean bagels should be illegal.
Fundamentally, none of the stuff trans people ask *me* to do costs me anything. They could be doing it specifically to make JKR mad and it'd be nothing to me.
I think we are clearly past the point where she is incapable of making what she is trying to say clear to anyone who is not as singularly obsessed with this as she is tbh