There is very little advantage, if any. In fact most trans women have less testosterone because they are on HRT which blocks testosterone and puts estrogen into their bodies.

Trans women are women, so therefore they belong in women’s sports. Unless you want to argue they aren’t women in which case that’s a transphobic viewpoint.

We either accept that they are women, or we don’t. I don’t understand why we segregate sports anyway. It would be better being split by weight, height, etc. We can’t exclude trans women from women’s spaces.

I know of a grand total of zero trans women who “became trans” (you don’t become trans, you are trans) so they could beat other women in women’s sports. It’s a convenient excuse for hate though.