Why does the sports thing have to be so crude, one-sided, and disingenuously woman-focused? I say we keep sports in the discussion, but we need to come up with more than a binary system. Given how many age divisions are in some youth leagues, the existence of the paralympics, and weight classes there are for boxing, it can be done. Experts in each sport need to come up with a list of ALL possible physical advantages and disadvantage tailored to that specific sport, sex-based or not and come up with a tiered point system of physicality. Michael Phelps should be in his own super league. I'd also say we need to get a lot more imaginative with inventing new games, which use bodies in innovative ways.