It's the conclusion that you draw from this that matters. Is poor decision making and low impulse control also just a consequence of poverty, of being born in an environment that does not nurture these skills? Or does the buck stop there and do these poor people only have themselves to blame?
The same applies to addiction, whether to a particular substance or obesity-related. It was only when I spent some time in Texas that I realized how much harder it is to eat well and exercise compared to my life in Amsterdam!
Or religion. Having experienced both a very religious life, and a very 'secular' life, the one thing it taught me is how little, in the end, my behavior and beliefs were shaped by my 'individual' thoughts and decisions. Very humbling.
I tend to be on the no-blame side on these issues, as I strongly believe we're much less 'individuals' than we think, and much more a product of our upbringing and our path in life, which is to a large degree out of our hand. The ability to make choices is, in itself, largely not a choice.
I hold that position because I've seen and experienced how fragile and context-dependent people are, and because there are volumes of research that support this.
I also believe it is, regardless of the facts, a more optimistic, constructive, and humble approach to life. It reminds me am not the product of (just) my own willpower and craftiness; I am the product of nurturing parents, a good education, a relatively stable upbringing, and inspiring, like-minded friends and acquaintances.
That and the fact that having children makes them poor by robbing them of the time to improve themselves and earn a higher salary.