But you know as well as I do that transgender activists oppose all research that does not begin with the assumption that transgender identity is simple human diversity same as having curly or straight hair (which btw still has biological and evolutionary roots).

We have documented historical evidence of trans people existing in society for at least three thousand years. If trans folks have existed in every kind of human society imaginable, then it’s pants-on-head stupid to suppose trans identities are anything other than just a natural part of the human condition.