But it’s more than a single generation thing. If you live for 18 years in a family that has only recently put down roots in a new place, you won’t have family around, unlikely to have as many family friends around, etc. Community will likely be sparse and colder.

You essentially get a generational social debt put onto kids, over and over. It appears that cohesion is lost, pro-social behaviour decreases, focus on less social activity increases, and so on.