Because before that, life was very, very, very different than it is now, and not just because we have bigger buildings and better technology. Heredity was matrilineal and the primary deity was one of birth and abundance, not death and pain. Men and women lived in balance, and yes, reverse hierarchy helped keep any power-mad men in check, but just as polyamory is a fundamentally different relationship style than monogamy (and not just because more people are involved) pre-patriarchy was a very different social system.

The Danes have done an impressive job of bringing egalitarianism into the mainstream of their culture. They teach empathy in schools as well as encourage children to compete against themselves rather than each other. This is considered a good foundation for management skills and they have the world's 10th biggest economy. Patriachy is not human nature. It's not inevitable, and it's not necessary. That's why I bring it up.