We shouldn't push a positive mindset on anyone - positivity is not the kind of thing that should be pushed on people in the first place. But this doesn't mean that positive psychology has nothing to say as to how to cope with poverty, and for that matter other adversities (such as social marginalization, which seems especially insidious and hard to address given the dearth of social-capital-enhancing grassroots institutions in modern societies).

(The article also seems to weirdly conflate self-regulation/executive function and very-long-term time orientation then saying that the latter makes no sense in an overall risky environment, thus neither does the former. This hardly seems sensible. Just because not eating your marshmallow can be helpful to both, does not make them the same thing!)