That's a societal issue across cultures and races, it's not just a black boy/men thing. Boys get coddled, girls get pushed out and expected to be independent/get married/etc. You see it in Hispanic culture, Italian culture (The Sopranos put it on full display with AJ and Meadow...), etc.
The problem is that the economy has shifted so much that these men can't find the success they once did. For decades a man could skip college, fukk up and fall into a nice factory/blue collar job. With enough money to get married, have kids, buy a home, and send the kids to college. Those jobs are largely gone or restricted today, and men haven't really reacted. Instead men are skipping college, getting low paying jobs, and living just enough to take care of themselves with no shot at buying a house or raising a family. This is BAD.