I think we are mostly products of our surroundings so, yes, good decisions can help a lot. It just seems placing that level of "blame" is counter-productive and just does not represent reality on the ground. Trapped is trapped, you used the word yourself. I'd wager you have little idea the sorts of life traps that are laid out there. Having debt is pretty easy even with a better than average stability matrix. A single hit with bad luck is simply made worse as the "socially permitted" trolls eat their prey where no "socially permitted" social safety net exists that could possibly save them.
What is that? Trickle-down blame? You got yours? I simply don't understand the economics of "it's your own damn fault" with the force of a gavel.
The vast US homeless population suggests we don't really have a safety net, so much as a safety rope you need to hold on tight and pray. Consider, if all the homeless people showed up in the same place that would instantly be in the top 10 US cities.
Yes, I've lost jobs before because of corporate restructuring.
Imagine you went to a crappy school where you spent most of your days trying to avoid gangs rather than learning anything. You did everything people told you to do and you applied to some for-profit bullshit college that accepted you. You signed some paperwork that you literally didn't understand the details of (because of said shitty school and parents who have never dealt with this situation before and for-profit colleges that explicitly set out to target people exactly like you). Now you have $50,000 in debt that you literally can't even declare bankruptcy on and no marketable skills. What do you now do?
To blame it all on personal responsibility degenerates into a No True Scotsman argument very quickly. It's the kind of overly simplistic thinking that makes thirteen year old kids think Ayn Rand had it all figured out and never think further than than her heroic fantasy novels.
(I admit, I actually really like Ayn Rand's philosophy if it's seen as an ideal, rather than something that is practically p[possible. Marx and Engels were also idealists and in their perfect world everyone would be happy too.)
Humans are not born with an innate understanding of optimal decision making and the power of compound interest. Our environment shapes us to a massive degree and you're discounting this.