Let's take the example of women's sports if a transman can join a biological women's sport that transman is going to break the women's charts because he is not a biological woman he is a biological man, with a bigger body structure, bigger body, bigger lungs, biological they are better then biological women in body matters. I would say a better solution is that we make a trans sports team so that trans people can do sports against other trans people so it's fair to everyone: biological women, biological men, and trans people as a whole.