More about situation than age. This notion that we're automatically supposed to be away from our families by a certain age, much younger to some than others is not nessecerily ideal.
Neither is being a deadbeat.
I wish I HADN'T left my grandma's house when I did, because she needed me. But my uncle, who was on a lot of the same kind of talking points I see in this thread and in general on the topic, pushed for me to leave after I got fired from 1 of my 2 jobs at the time.
I ain't just leave, I moved cross country, out of spite. And this bytch ass nikka didn't take care of her like I was doing. Convinced her to sell her home that could still be in the family then moved her into his house to eat off her income while he lived above his means.