The issue with showcasing buff women, or women who are good at MMA, as a rebuttal against the argument they are not suited for combat is that both of those things -- getting that big as a woman, or being that skilled a combatant as a woman -- are both markedly harder to do in a post-apocalyptic wasteland.
Like, in order for women to get that huge they have to lift a crazy fucking amount, and they have to be incredibly strict with their diets . . to say nothing of their reliance on specialized supplements and sometimes outright pharmaceutical remedies. There won't be anyone in your end-of-the-world scenario -- where food is scarce, there are no supplements, and the ability to "train" will be severely curtailed by the environment and circumstances -- who is going to be super buff. If anything, most people would walking around malnourished and the people with the genetics to deal with that will be wiry and hardened, like they have bones made of teak. Getting that huge is essentially a luxury that relies on a surplus of calories, sleep, training time, and a low-cortisol state.
Which basically means that everyone will be relying on three things to be a successful violent person in such a scenario, and in this order: 1) their natural genetic endowment 2) their experience and 3) any training they can get. I'm sorry, but dudes are just naturally stronger and more savage. If you don't believe this, there's nothing else to talk about. This is not to say that a woman couldn't hold up her end in a fight or be especially vicious in a combat scenario. Because of course, you could always find that one woman (or man, for that matter) who is just a gifted killer or fighter. But you won't find a dozen of them, whereas you could probably pick a man out at random and train him to be deadly enough to a point that he only needs to fear a bigger, better trained man.
None of this should be controversial.
