This ends up being very effective as a wedge issue for Republicans, because they can make shit up about the other side, and run against the lies they tell themselves, because the truthful situation is complicated and the lie is simpler to understand.

Some sports are strictly separated by gender, and some are not. Generally speaking, it’s people who administer the leagues that make that decision. Everything from pro leagues down to rec leagues will have rules based on gender, and they are created by whoever administers the leagues to foster competition.

I don’t feel qualified to know which sports confer a distinct advantage to people who go through male puberty. It certainly isn’t all of them, but there must be some where it makes sense to exclude humans who have gone through male puberty from women’s leagues. But, I don’t feel most politicians are qualified to know that, either. People who know each sport best should make that decision, based on science and the knowledge of their sport, and politicians should just butt out. But you get better soundbites by lying about it and airing grievances about it than by being rational.