Let's keep it a buck, unless it's rape, women choose who gets to be fathers. You could a great dude, good job, good heart all of that, but if women aren't feeling you, you're not reproducing.
The system tore the black family apart, and neither side is really good at finding partners and making families. So yeah, single parenthood usually doesn't lead to the best outcome in children, but the shit doesn't address why it became like it is now.