>>106346125It's the pathological outcome of America's culture of self sufficiency and individualism. Parents are supposed to prepare their children for the world, but at the same time, the child is supposed so struggle, strive, and succeed on their own.
This results in parents all but kicking their children out at 18 (or 21 or 22 or so, ifyou're lucky enough to have them provide for college education), with the child having to rely on his parents for assistance not only being indicative of the child's failure to thrive, but also as a failure of the parent's to properly raise their child as a minor.
As such, many families will outright refuse to assist their adult children, as it explicitly confirms the failure of the parent to properly raise their children.
It's expected that children will drift from their parents over time because the children, ostensibly, are making their own lives and their own families. Maybe a visit once every few months, a phone call every other week or so, perhaps even a family reunion, but American structure is very much structured around the immediate nuclear family; mother, father, and children.