I don’t know whether I’ve told this story before but back when I was actively competing in the martial arts, the highest-ranked woman black belt in the country at the time worked out in the same dojo that I did. I competed against her many, many times. My sensei, realizing I could and would clean up the mat with her unless told otherwise, directed me to go easy on her. I, of course, complied. She always beat me.
My experience is the source of my misgivings about women physically fighting with men, especially hand-to-hand.
Using weapons is a somewhat different story. When I was practicing kendo, a martial art in which men and women compete against each other on equal terms, one of our female black belts could go toe-to-toe with our best male swordsmen. Other than Sensei, of course. He’d reputedly been head kendo instructor for the Imperial Army and was unbeatable.