In many places as well until very recently there wasn't really a culture of living on your own or with a partner or friends before marriage. My mother and my boyfriend's mother both got married when they were around 26-27 (in the mid to late 90's) and they lived with their parents until then, and the same for my father.Yeah I mean where I live, over 50% of 25-29 year olds are still living with their parents and a quarter of 30-35 year olds still live with them. It’s really only in the UK and USA where it’s culturally acceptable to shove your kid out age 18. I’d say in the UK this is more of a middle class attitude as well tbh, British working class families are more likely to have young people still living at home well into their late 20s.
Even if you moved away for uni like my mother did it was sort of common to then move back to your hometown to live with your family and find a job there, unless you were pursuing a more ambitious or unconventional career path.