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.
But it does kind of diminish the women’s sports.
Consider say, the 100 meter sprint. The winning women’s times at the Olympics were all so far behind the men that literally none of the winning times would have even qualified to be at the Olympics! (Mens min qualifying time is under 10 seconds, Alfred won gold at 10.72 seconds, Jefferson took bronze at 10.92.) At the other end of the scale, for the 10,000 meter race, the last placing male ran it in just over 29 minutes which was 5 seconds faster than the Olympic women’s record for the same distance and was a full minute and a half faster than the gold winning woman.
Similarly for a lot of team sports you’d be relegating teams with women on them to a much lower league because at the top of the table, raw physical strength plays a role.
Splitting up by sex means we can watch and appreciate the best women play their sport at the highest level and celebrate them. Or almost every Olympic sport would just be guy guy guy.