If you start excluding trans athletes from women’s sports, you very quickly get to a world where every girl who wants to participate in sports must prove her womanhood and sufficient femininity. An athlete is “too tall,” or “her shoulders are too muscular” maybe she isn’t a real girl, let’s force her to prove she’s a “real girl” and how exactly do you plan to do that? You have to then deploy an inspection infrastructure. Maybe she was AFAB but an opposing team alleges the athlete is actually XY and has a mutation that causes her to have external female genitalia. So how do you plan to resolve this dispute? What if some girl has too much peach fuzz on her upper lip and the other team alleges she’s really not a girl, do all female athletes have to travel with their birth certificates on them, and any who don’t look sufficiently feminine and are too strong have to constantly prove their gender? Don’t you see how destructive this will be to women’s sports, if women have to constantly appear sufficiently feminine while engaging in feats of athleticism, strength and speed? Please just leave the handful of trans athletes alone.