With a female and a male of the same height, weight, and body fat percentage, the female will still need less food and oxygen because she has a slower metabolism.

Same fallcy, people are not statistics, you arent dealing with people of the same height, weight and body fat percentage. You can very well have some men that need less resources than some women, they can be smaller. I guarantee Lizzo needs more resources than me. This is the same black IQ argument. I guess we shouldnt let Ben Carson be a brain surgeon because all things being equal blacks have lower IQs. Because it turns out he is a pretty damn good brain surgeon, even though on average, blacks are not the best brain surgeons.

You could just calculate each individuals resource requirements rather than using a heuristic, you would end up with MORE women than men this way like you want, without discriminating on sex