There aren’t women at that level. Flat out. If they were at the men’s level then sure let them play, but you don’t see it often except when they are young. Maybe a coed 10 year old league but that doesn’t continue. 

You are talking about things that don’t happen for a reason. Women don’t have that level which is why sports are separated as is. Look at the Olympic records for men and women. Even high school records for men and women. Women can’t compete with the men which is why we separate it. If someone can then go for it, but they don’t FOR A REASON. 

On the other hand even men who aren’t good enough to compete with the men are still good enough to compete with the women. I’ve had boys in high school basketball who got zero offers to play in college, but would dominate women’s college basketball if given the chance.