One large argument is that there is larger biological differences than gender-related ones, and we usually do not split the player base based on the biggest bio

One large argument is that there is larger biological differences than gender-related ones, and we usually do not split the player base based on the biggest biological differences. There is some small exception for sports which historically has a close connection to betting (horse racing and boxing), but then we have sports like baseball which is not separated based on height. We could introduce a general rule where if a biological trait has above a statistical threshold of being beneficial, then the sport should split based on that trait. I would love see a statistician explore that and paint us a picture of how the most popular sports would look like.