I think the distinction that people don’t make is that…

1. For a woman, sometimes you can get a man to fight for you, so it makes sense to get him to take on all that risk himself.
   
2. For a woman, the upper body strength distribution is almost bimodal, so it makes even more sense not to fight and send a man instead if you might end up fighting a man.
3. Society often treats women and their violence as harmless.  (The flip side of the glass ceiling.)

So if you have a high stress situation consisting only of women, isolated from society and from men, it may well get violent.