Earlier quoted context omitted.
My parents grew up poor in manner that is more extreme than anything OP described in the post and they always remind me that its just hard work and grit.
That, and an environmnet that allows folks "from the wrong side of the tracks," to get ahead. For all its faults, the US is just such a place. I suspect that many other nations are starting to improve. At one time, the UK was a nation that you couldn't get ahead, unless you were of a certain class. I think that it is much more like the US, nowadays. You can hear lots of cockney accents in Harrods.
Vast swathes of this country look no better than the developing nations Sarah McLaughlin would go to to sing sad music and hold little kids to beg people for money in television ads.
Like I don't think you're wrong necessarily but at the same time, it really, really matters which tracks you're on the wrong side of.