If you try to define athletic divisions by sex, you're going to have a hard time. The world's best athletes probably all have some unusual biology. About 1.7% of people are not completely biological male or female. I would expect that proportion to be higher for Olympic athletes. Excluding 1.7% or 2% or 10% of the world's best athletes from competing would not be fair.
Why not? Aren't you mixing gender and sex?
If you try to define athletic divisions by sex, you're going to have a hard time. The world's best athletes probably all have some unusual biology. About 1.7% of people are not completely biological male or female. I would expect that proportion to be higher for Olympic athletes. Excluding 1.7% or 2% or 10% of the world's best athletes from competing would not be fair.
Why do you believe that?