I don't think it should be permanent, but the other extreme of "you're an adult now, good luck" is unreasonable too. It shouldn't be shamed to live with your parents after education and/or during early career. And if you can foot the bill to move out later in life after saving up, great.

Personally, it worked out for me. raise in my grandparents house until I was 12, but also grew up to see my parent go to military for ~6 years and my uncles getting kicked out later on as well. It's far from perfect but increasing divorce rates don't exactly show that being separated is better.