I'm all about being practical and living at home if the situation warrants it. Until he was 30 (when we got married and I moved in), DH lived at home with his grandma and his mother looking after his every need - they paid utils, groceries, provided breakfast, lunch, dinner, etc etc etc. Classic spoiled kid lol. Instead, he was responsible and assisted his mom and grandma in tasks they preferred not to do (he handled all their banking, ran whatever errands were needed, etc). And had no issues being an independent, mature adult.
Living at home all those years with barely any expenses meant that he had an impressive savings rate, which made starting our lives together extremely smooth and easy. I'm extremely happy he had no desire/need to assert his independence by moving out.
That said, most Americans highly value living on your own. So ymmv.