A big part is that the processed foods of America are make us have drug like cravings for things we consume too much of, salt, oil sugar, etc.

And we’re dependant on them much of the time because of our subsist to work lifestyle.

It’s expensive for it to be easy to eat well in America. While the owners order postmate’s cobb salads, have household staff, and eat out with abandon, in addition to being on their own time, eating healthy while poor involved dodging endless temptation to eat crap imstead while prepping and cooking meal kits before and/or after work, lengthening the time off work devoted to work. You can say "it’s important so do it or you’re just irresponsible, but when time is a commodity of survival for the poor, taking care of yourself is often the first priority to be sold off.