“Patriarchy” is designed to benefit women and children.
It answers the question "How do you motivate a man to stick around and provide support and protection for a wife and children?"
A man will care for and protect what he feels is "his". In the "inner city", the apartment, the furniture, the children -- all that is the woman's property, and she will not hesitate to tell the current man in her life that that's how it is. So when the relationship becomes unsatisfying, he leaves. He has nothing invested there.
Very good point.
Unwed mothers of dating age get very uppity when this is pointed out to them. WHEN DATED few men want to be corralled into raising some other man’s mistake.