Rust Belt decay is obviously less conducive to happiness, but I think “boom towns” (where a marquee industry makes a small percentage of the population very rich) also aren’t conductive to happiness. Might explain why the politics out of place as like San Francisco is so apocalyptic. People want to have a normal life but the economy of the city has bifurcated the population into “rich but stressed out” and “struggling to get by.”
To be fair I get the sentiment. DC was the same way. In DC it was childless wealthy professionals on one side (mostly white and Asian) and service workers on the other (mostly Black and Latino). It was depressing as hell and we had to get out.