My son is 26 and lives at home, working FT and very busy with a GF. His salary doesn’t allow him to live a decent life on his own, he’d need. Roommate. We don’t mind him being here.
But…I totally agree with your statement that they need to be living on their own to become full fledged adults. It’s almost like he’s on college break all the time. He does need to move forward, but at the same time I’m not pushing him out, but I know it would be better for him in some ways.