As someone in this position I can say that the lack of a commute has been amazing, I'm sleeping much better and less stressed overall but the lack of social contact is definitely weighing down.
I think cultures which move their children directly from the family household into a marriage may be on to something.
Given that, it could be a gap from family to 20s single life may cause a shock to the system to be better understood.
Is there such a thing as too harsh an emotional break to self reliance and does it have an epigenetic or other measurable response?
And consider elites almost always have a big family watching their back, so to speak. Often nurturing and supportive in ways the hip youth find stifling and cowardly.