I agree with this part. It's just always interesting to learn more about how people's brains/bodies are different and how much of feeling/thought/experience has physical roots. I also agree with all the concerns you raised: if any biological trait is even allegedly linked to being transgender, scientists will try to prevent or cure it, and they'll also use the info to gatekeep whatever medical procedures (and social acceptance and legal recognition!) trans people want, including by making it more expensive to qualify as validly trans, and by disqualifying some people from having a right to their gender just because they don't pass whatever "diagnostic" test. That's transmedicalism (no good). I want both outcomes: more science, more freedom. They shouldn't conflict. I think we get there by recognizing that there are all different ways of being transgender, including people who are trans because their body is doing something atypical, or their physical brain is doing something atypical, or for reasons having to do with culture, language, philosophy, political goals, or personal experiences, and that none of this is mutually exclusive. I could have had a hormonal variation in utero, and I could have some as-yet-undiscovered "transgender gene," and I could have felt misplaced in my own culture and the best language I found/created to describe it was transgender language, and I could have current political beliefs that it's always OK to be trans even if a person wasn't "born that way" and simply chooses to be trans. All of those things can be true. If we first recognize that all people are allowed to be trans simply because they want to be trans or say they are trans, it becomes less perilous to inquire, in a curious and open way, about possible biological traits that might be found in some trans people but not others — because then the people who don't have that trait, or can't prove that they have it, don't lose their right to their gender.