There are definitely some benefits to living on one's own for a while, but I do not think we should continue to view as the only viable option, or even the default for that matter.
In many parts of the world, the point where you are expected to (and socially pressured to) move out of your parents home is marriage. Of course there are exceptions, like moving to a faraway city for a job, etc.
Whereas I see many American youths bleeding away their income on rent and expenses while living 10 minutes away from their parents' home.