It's a fair point here, but:

"normal" in a psychological sense is very different from "normal" in a medical sense.

It's a maladaptive behavior, sure, but it's been documented in various ways for centuries. I'd assume as far back as recorded history goes, in fact. Very different from the current "I can actually change my gender" mindset.

I know it's an unpopular opinion, but there's a very important demarcation line between "men who get off in some way on dressing like women" and "men who believe by wearing a wig and makeup they can become women."