Girls are better suited to artistic competitions, such as figure skating, gymnastics, or beauty pageants. Every once in a while, you see great artistry in individual girls'activities like tennis, golf, and track. However, team girls sports is basically defrauding them and everybody else- they begin to think they're as good as men.
One of the reasons Tennessee became a powerhouse, was that because their corch used men as her scout team. Never mind these guys could barely play intramurals, they were all better than the girls and Pat Summit always had to make them dial it down.
Not only that, but the constant pounding and bumping does harm to their uteruses, and could cause problems with them bearing many strong men.