Only East Coast elitism characterizes LA like that. The US was developed from east to west, the native inhabitants and settlers of NY were different than the like in LA and influenced differently. LA is much younger and came up in a completely different era than NY, 2800 miles apart, in a part of the country that is characteristically different across the board...
LA is different and arguably the most unique city in the country. But its unquestionably a city, the only place on the East Coast, and probably the entire country, that can say it's more urban than LA is NY. No one else, and that's what makes NY arguably the most unique city in the country, because no other place really pulls off what NY does at that level...
But that doesn't mean NY is the only urban city in the country, or that everyone outside of NY's orbit is a suburb. Otherwise, you can characterize NY as a collection if suburbs, as each borough were all initially independent cities, and each borough has suburban neighborhoods in all of them. So your description makes no sense. New York City (Manhattan) annexed adjacent cities to make a larger city, this is hardly something to talk about other places for doing...