i'd like to see some factual evidence to back up those claims...
fun fact #937133789
A few years back, the Royal Marines decided to allow a couple of women volenteers to try out for selection. They came extremely close to passing, but (so rumour has it) they weren't allowed to finish. Why? because they were close to passing
and if they did, entitling them to wear the RM green beret, then the Marines and the MOD would have to let women become Marines, or at least front-line infantry soldiers.