If you live in SF, you have easy access to all sorts of great things, but the downside is that unless you are fabulously wealthy, you are most likely renting an old and not necessarily well-maintained apartment with one (or two or three or more...) roommates, in a neighborhood with a disturbing number of homeless people and/or occasional violent crime, and you have to take the bus (or ride a bike) everywhere you go because it's just too much of an expensive hassle to drive anywhere. I'm not describing the living standards for college students or blue collar people, these are living standards for people who are probably in the top 5% income bracket in the entire country.
Those same people will tell you stuff like, why would you want to own a home? Why would you want to live by yourself? What do you have against homeless people? Why would you want a car in the first place? What's wrong with you, you barbarian!
There's something to be said for those perspectives, and I appreciate the value of living in a really dense and culturally rich city with great public transportation. But so many of the SF residents that I know go way beyond looking on the bright side, to the point of fetishizing the very things that can make SF an unpleasant place to live.
Maybe if I lived there I'd be like that too. It's natural to always want to look on the bright side of whatever your living situation is, it's just annoying when people get super militant about it, to the point of accusing you of being a bad or stupid person if you don't want to live there too.