Of course our ancestors fought. But you seem to think there is world-class level fighting and then not fighting -- as if skill was a binary (you either got it or you don't) sort of thing.
Fighting skill comes ONLY from fighting, and you are only as good as the people you train/spar/fight with. While many of our ancestors fought, they weren't going around fighting the very best, most skillful people from around the world (as people are today). Not only that, but the training method of TMAs is grossly inferior to the modern sport model of training.
And that opinion tells me that you don't fight or realistically spar -- as this view is only held by theoretical nonfighters. Realistic fighting skills work anywhere (gym, ring, back alley, etc.) and in any fighting situation.in my opinion, there is no "fighting for real" unless you're in a real fight, life and death. does anybody here go looking for that kind of experience? even if you win, it could start something that gets out of control, each side seeking revenge for their losses.