"Look at all other species on this earth, they're built differently to accommodate different tasks. The men are strong to collect food and the women stay to raise their young."
So which are these animals where the mother stays at home while the father goes out to collect food for the family? I'm struggling to think of a single species.
Cows- nope! You don't see a bull bringing back some nice grass for the cows and calves of his flock.
Horses- nope! Stallions are not known for their selfless tendencies.
Sheep- same here.
Lions- errr, it actually tends to be the lioness who does most of the hunting for the pack. (As well as suckling the babies, obviously)
Canines- often only the alpha pair that is allowed to breed, hunting is done and food brought back by all pack members, of both sexes.
Elephants- herd is led by a matriarch, males lead a separate life and contribute nothing to the young beyond their sperm.
Bees- worker bees are all female, only function of the male drones is to mate with the queen.
Birds- tend to take it in turns.
Fish- all possible configurations here, from releasing eggs randomly, to either male or female brooding.
Human pre-agricultural societies- as far as evidence goes, far less strictly gendered than modern society: the whole tribe on the move and involved in food collecting.
Traditional agricultural societies- vary a fair bit, in W Africa for instance, women traditionally do most of the heavy farming (men involve in fighting and decision-making).
Come on OP, tell us- which are these species???