No more men’s and women’s league, no more “gender eligibility” requirements, a common dresscode, same standards and rules for all.
Edit: since it looks like people missing the word let: the suggestion isn’t to force desegregation. It’s to allow it or even make it the default. Someone else made a good suggestion: segregate by attributes specific to the sport. In boxing it’s weight class, in basketball it could be height, in biking it could even be doped and non doped. Sex and gender need not be the very first thing to segregate by.
Firstly, most sports have an open league and a women’s league. Women can play in the “men’s” leagues if they are able. Secondly there is an olympic.sport where men and women compete against each other, dressage.
Women can play in the NFL, NBA, NHL, and MLB
To your point, Manon Rheaume played a pre season game with the Tampa Bay Lightning in the early 90s.