Even amongst contemporary rap their assertion is incorrect, yes. I would also like to state this is all very amusing criticisms considering rock and roll was popularized on the concepts of sex, drugs, and rebellion; it is in part why the sexual liberation happened. But I suppose that is a tangent of sorts. Anyway, urban culture [see: hip hop, contemporary R&B, rapping, turntablism, etc] in general has been diverse since its inception in the early seventies and to claim shallow is disingenuous. 

Also, if you don't like the language of the street don't listen to the language of the street. :gray

[youtube]https://www.youtube.com/watch?v=PobrSpMwKk4[/youtube]