Simple - the law allowing drugs having to do with these fool so called gender transformations was already in place and is not the issue of taking them to enhance sports performance - which is not...allowed.
It's a different issue.
And then there is former UFC World Bantam Weight Champion: Meisha Tate.
She is all female.
One of the few in that sport who is not built like a male.
There is a video on YouTube where she wrestles with and dusts four or five male wrestkers.
Unfair advantage?
And then there is current UFC Bantamweight Champion: Amanda Nunes.
As with many Brazilian Fighters; her physique is kind of male looking.
Her punching power is matched by very few of the other females.
Now here's the thing. She is not only an out in the open Lesbian, but obviously the so called "male" in her relationship with another, much more feminine female.
One might conclude "well, she should be fighting males - all that unnatural testosterone that makes her the so called 'male' in a Lesbian relationship is unfair when fighting a straight female..."
Problem with that is that the Russian Fighter: Valentina Shevchenko, is not only straight, but is nowhere near as male looking, physically, and yet Amanda can barely keep up with her; given Val's great skills.