Women can compete in men’s sports without restriction. That’s because in most of those sports they are inherently, biologically disadvantaged. This is simply a medical, biological, physical fact.

But for men to compete as women, they have to super duper promise and cross their hearts that they won’t change their mind a week later and compete as male for four years. They don’t have to live as a woman, they just have to promise not to compete in sports as a man for four years. Pinky swears.

The other requirement for men is that they reduce their testosterone before the Olympics will use the preferred pronoun. So he does’t count as a she until he meets a hormone level requirement. To compete as a woman, he has to take a drug that alters his physical state in a way that impacts his performance. It may not be “enhancing” but it is most definitely performance-affecting.