I agree with you in general, but the OP was asking about a specific type of music. The sad fact is that mainstream music today really doesn't do much social commentary (there are a couple exceptions that others have pointed out, but in a general sense), so it's hard to give good answers besides "you need to broaden what you're listening to". If OP wants to know where it is and it's not on the radio, what other answers are there?

The angle that the lack of mainstream social commentary is most likely by design is another topic, but even if you don't buy into that, it's still not on most radio stations.