Rap music grew out of other traditions, both in the USA and more especially in the West Indies, with roots back in Africa.

The music industry has cynically decided to concentrate largely on the nastiest varieties, and encourage and reward them, while effectively freezing out and starving out people who have tried to use the form in different ways, closer to the spirit of the traditional roots.

Don't blame the rappers, blame the money-machine that will try to corrupt anything it gets hold of. Thank God that folk-music is out of fashion these days.