That's a fun anecdote. I referee high school and youth wrestling and there are several coaches who are paraplegic or quadriplegic because of neck or spinal injuries they got wrestling. I assume there are other injured people who didn't want to have anything to do with the sport after their injury.
My non-medical person understanding is that the physiology and mechanics in the knee are very different but beyond that it is a "no one knows" situation which seems shameful.
Again, have zero medical background and am not a woman but my mental model from my wife and daughters' experience and from paying a lot of attention to professional women's soccer is that it is simultaneously true that there are a huge number of physical/biological things when it comes to athletics that completely different in women and yet also that they are entirely unstudied. Like it is just a crazy giant blind spot.
My sports photography habit has gotten me out to all kinds of games and I've discovered I really like women's field hockey which is almost exclusively a female sport in North America. I was surprised to find out that men's field hockey is super big internationally, because unlike soccer, people in the US never got the message the field hockey was a huge international game.
Overall women and girls are playing more than, say, 10 years ago. But they still play considerably less than men and boys, at all levels, at least in soccer, and there are many, many more joint injuries.
It is more likely to happen when they are menstruating so they can get some protection by tracking their periods so that they avoid hard training on dangerous days.
Correlation/causation. Could be as simple as being more tired than usual. Being tired is more dangerous for lots of sports, and is true for men as well (just not on a predictable schedule).
They're also more likely to get concussions from things like headers. The female body is just not as adept at physical activity as the male one. It's almost like its main focus is on creating babies.
