>Ballet is worse than a World War.

Men are just one half of the humanity's whole, that evolved according to the environment back then. There are literally lizards like Komodo dragons and female only lizards that multiply through parthenogenesis, and there aren't any kind of imaginary hugbox bullshit among them. And since Humans are animals too, without men women would naturally take men-like characteristics over time, unless some centralized control is maintained that would inhibit the natural course of events.