Its because unmarried women regard the state as de facto husband/provider that gives them whatever they want. And they can screw around with whoever they want while sugar daddy govt is their security and resources and protector.
Its such a successful gynocentric model.
I remember returning to California from the Middle East as a result of the 1967 war there. I crossed from the East Bay and through Palo Alto to Stanford for a job interview. In Black East Palo Alto the streets were loaded with people celebrating. I needed gas, and at the station asked the attendant what was the occasion. He said it was “Mother’s Day.” I said I didn’t know that, but I had been abroad for a number of years. The answer was “Sure, this the day the welfare checks arrive.”