That image is incredibly outdated and has become an increasingly tired cliche.
This applies equally to the outer boroughs. Poorer neighborhoods (in any borough) are scrappier, of course, than the rich areas. But they're just as full of life and vibrancy.
I really take your point on the media projection. It's relentless. And it really keeps an outdated image alive, especially in the minds of people who don't live here and can't directly contrast with their own eyes.