All I have to do is point out that HE is using a dramatic instance to make the claim that what he did is possible for everyone. The fact that 80% of the US population dies in the same social class they were born into is not something I should have to establish--that's well known enough.
He pointed out that it was possible, not that it is possible for everyone. So maybe better to learn from his experience.
While we need to accept that there are some who are either physically or mentally incapable of providing for themselves, for the rest we need solutions to helping them become self supportive.
We need to learn from those who have succeeded.