Obviously this won’t work for all sports, but things like football, track, soccer, it would allow for de-gendered team, even allowing athletes with the skills but not the genetically-endowed physical attributes to have a place to play.
Note: I know very little about sports and being on a sports team, so please point out anything that doesn’t make sense.
I want to say that because understanding of steroids and sports medicine they could be done in a way to prevent that for many sports. But o also know that would require rigorously enforced regulation which athletes would then try to game, which would probably lead to more deaths on the field.