Now that a) it’s impossible to afford rent and it’s becoming more common and b) we’re transitioning from Boomers (who tended to have a more antagonistic and condescending relationship with their children) to Gen X being the “older generation”, I suspect that perception is in the process of changing now-a-days.

But previous generations were expected to nag the shit out of their kids to get a job and/or spouse and a house so the parents could do cruises full time in their retirement or some such. So to a large extent, it was societal pressure and people got the idea that living with your parents was “pathetic” *from their parents.