Eh, I sorta agree. But applying some basic math to this page[1], we find that 4% of American households that rent, are renting an NYC apartment. That's a pretty sizable chunk.
Maybe I worded it badly -- there's no attitude, I'm just saying that if a site has something broken for its largest domestic group of customers, but it works for everyone else, it doesn't matter -- it's broken period, and not an edge case.
I've always thought of CL as a community/local site, meaning it is up to the community to really shape it. CL can provide guidance and tools, but it is still up to the community; for example, if your community actively uses the flagging feature to cut down on posts that make the site worse, those posts will decrease in occurrence. NYC has ~14M people, so it is just harder to create a community that agrees on what is and isn't appropriate.
I always think it's funny that the most cosmopolitan cities can breed the most parochial attitudes.