Il am not sure I think that, but as a matter of fact successful people tend to be bankrolled by either friends, family, or some kind of extended network that allows them to fail several times. I think it is unfair, and I find it really obnoxious when they lecture us about grit and bootstraps instead of being grateful for their network or luck, but it is what it is.
Yes, exactly this. A second chance is a safety net, available mostly to those with the circumstances or resources to deploy it. One helpful circumstance being youth (plenty of time), while an obvious resource is personal or, more likely for the younger, parental wealth.
Attitudes to risk taking are similar, e.g. your fear of high wire walking depends hugely on whether you have a safety line or not. Wealthy kids might pride them themselves on taking chances where the reality is that in their whole existence they have never been exposed to the possibility of paying the price for failure.