He ain't wrong.
KRS, PRT, King Sun, Cube, X Clan, Paris, and the like were once hugely popular, and when they were popular, young Black folks had a far different mentality. You wanted to do better, you wanted to go to school, learn a trade, get a degree or what have you, Teenage pregnancy in the Black community was at it's lowest levels ever recorded during that time (~89's-mid 90's), enrollment in 2 and 4 year colleges rose during that time, we were finally shaking off the bullshit of the 70's and 80's.
But that kind of music, positivity and consciousness, was replaced by the shit we got now. First, with material excess where you had rappers talmbout their latest Bentley, high dollar champagnes, designer clothes, and now by flat out serial killer and drug addict music.
Shit has done a number on us.