I live a stagnant life (shut-in, somewhat rural area) so there may actually be "greener grass" somewhere but I am unlikely to ever even see it, which is part of my point. And funnily enough, in a literal sense importance of green well-kept lawns is a relatively modern problem as well (going back to aristocrats) adding to sprawl (and bad for pollinators/other wildlife).

To hammer my point home... on top of USA's car-centric sprawl, there is also no freedom-to-roam enshrined in law (like Europe has along with the Schengen Area) and I don't want to end up homeless without even a car to live in.

There are also a lot of other modern USA problems that are reduced or eliminated in other countries (healthcare, tax filing, worker protections, diet). Which is not to say they don't have their own problems, but being the richest country in the world certainly is not reflected in our placement when it comes to global statistics of well-being (because yeah, our wealth is concentrated at the top).