“In theory it should be an even contest. It is one sport where the contestants are matched by general size and weight — but as another poster pointed out, the upper body strength differential probably puts most young women at a disadvantage.”
It’s not just the “upper body strength differential.” Men are more densely packed with muscle all around. Also, there’s that whole testosterone thing.
Not that training, technique, and talent can’t bridge the gap—up to a certain weight/maturity limit. But that brings us back to other problems (i.e. unseemliness and lose-lose).
If the girl has talent, she might be able to beat a few 8,9, and 10th grade boys in her weight class. Even a below average 11th & 12th grade male wrestler will easily dispatch her. Most boys improve over the course of high school; she’s already peaked in 9th grade, and will never be able to beat the older boys.