but lets not pretend it’s not our own decision what we shove in our mouths.

If it is for you, you should consider yourself lucky, compared to big portion of the US population (or world population for that matter, but we're talking US now). Just like you can't just will yourself into owning a big house, or whatever luxury you can't afford, a lot of people can't will themselves into having enough money and time to have a proper food selection. That's not even talking about the fact that for a lot of people it will require moving into some other part of the country.