Look at it this way too: humans have been messing with their bodies in all kinds of fucked up ways for centuries. At least in this case you have someone who's a consenting adult who's doing this willingly, seeking out a professional, in a sterile environment. This isn't like footbinding, FGM, or Chinese eunuchs.
Someone mentioned lobotomies? The method was basically take an icepick, jam it through someone's eye socket and swirl around. The
guy who was most famous for it would travel around with a screwdriver in his pocket, and perform them on the go. And they were done for the flimsiest of reasons. No tests, or examinations, nothing. A lot of times it was because the person was an embarassment to the family, and most likely would have grown of their behavior, or could have benefited more from counseling. (Like poor
Rosemary Kennedy)
In fact, I'd be willing to bet more than a few of the victims of this treatment were LGBT. Very sickening chapter in this history of psychiatry.