I fucking knew it. People have this idea that human roles are defined by biology. No, they are defined by competition. When we compete against the environment, being 20% weaker or smaller doesn't matter; you can throw a spear just as fine as the biggest person. When we compete against each other, being 1% stronger is a gigantic, monumental advantage.
This nonsense about gender roles is from lampooning nobility post-enlightenment. Us peasants have always just did what needed to be done.