I think the person who wrote the post was arguing that nothing truly positive ever came out of gangsta rap. Though I dissagree with that line of thinking, other posters kept insinuating that he didn't really like rap, which is what I basically had a problem with. People were acting as if gangster rap is/was the bread & butter of hip hop, even though hip hop was here a whole decade and a half before it was even thought of.
It's true that for the most part Gangsta rap was hip hop's "cash cow" in the early 90's, but niggas just gave it WAY too much credit.
1)If gangster rap didn't exist, hip hop would still be here, though maybe on a lesser scale. 2)There are too many other sub-genres in hip hop for a statement like that to be made.