I think we overestimate for how many of them this is a realistic path. Quite a few of them will struggle for life. Have no family or a dysfunctional one, no marketable skills or ability to gain them, mental issues and cognitive shortcomings, wrong kind of friends/network, a whole host of issues.
Miracle comeback stories will grab the attention, but shouldn't be seen as the normal path. The normal path may be dedicating enormous resources for very little return.
I don't have the answers. You can't do nothing but you can't babysit somebody for their entire life either.