Why do you think administration of testosterone and testosterone inducing drugs is forbidden for professional athletes?
Lol this has just as merit as “why do you think they don’t take homosexuals in the military”. Um… because it only takes a bunch of prejudiced guys to believe so in order to regulate so, ever since the Old Testament.
Is the effect comparable across sports? Are the effects meaningful for high-testosterone women and/or trans women in sports? I doubt it, so do most organizations I cited.