Now, as far as my powdery ass knows, testosterone not only makes you beefy, it also boosts your mood. It lowers anxiety, for example. Less anxiety via an illegal substance surely is what they call an unfair advantage in a competition.
Again, in the end it won't make women suddenly stand a chance against men in most disciplines (look up records in throwing disciplines. Javelin throw, afaik, the male and female records differ by 20 metres or something, with a heavier javelin for men, obviously), but just on a bureaucratic level, either all can shoot up, or nobody can.
I'm sperging because while FtM's won't win men's competitions (not even in figure skating. They might bring more elegance and flexibility, but you still have to deliver those quadruple jumps), I still don't want male athletes having to deal with those emotional vampires. We all know the stories of them crying in bathrooms when confronted with male socialization and bantering or gay men rejecting them (which will never be NOT funny).
You just know that those histrionic bitches would poison the atmosphere, and would hog all the attention. That's why I hope FtM's who are on T are barred from competing. FtM's not on T are free to compete, which they won't.
That being said, I'd love to see a lil pooner trying to compete in the 110m hurdles sprint with those tall hunks. They could beat them by just running under the 1.07m tall hurdles, after all! (hurdles in the female category are 84cm, so close to a foot shorter.)
The longer you think about the whole sports stuff, the more ridiculous it gets. One really asks oneself, surely people know from their life experience that's it's bullshit.
Alas ...