Based on personal experience, people that are really really grimy weren't even really from the hood, they may have just spent a lot of time there because of unresolved stereotypical proclivities. Not saying that was ODB but it definitely does include a lot of entertainers.

There is also the education angle, most people that really grew up lower class didn't have access to good education. Some did, but how hood were they really if so? However, there are always exceptions

IDK