Men who have transitioned to female are welcome to do so, and live life free and pursue happiness like anyone else.
But athletics is set up in categories to best promote fairness to participants. It is not fair to biological women to have to compete against someone who developed biological male muscles, which as science proves, are much denser and stronger on average, and a male skeletol frame, which gives a distinct advantage in strength, speed, and jumping ability.
There is nothing wrong with having a distinct category for those transitioned from male to compete. That is not discrimination or bigotry, it is physiological science.



