You're making a common fallacy when talking about artistic genres... "Bad rap exists, therefore rap is bad." I probably don't need to explain why this is misguided.

Also: Rap is not poetry. It borrows elements from poetry, but it also borrows elements from public speaking, sports, preaching, and good old-fashioned conversation. Amongst other stuff. It's a different thing. It's its own thing! Rap!

Why am I having to explain this to people on Hacker News?