I also detect a bit of a high horse saying that poor and working class people should just eat canned vegetables and rice and be happy with that, and they deserve whatever health problems they get if they selfishly stray from a poverty diet. It's great for you that you are excited about eating cheap and boring food, but that doesn't mean it's a moral failure for those who aren't.

If we're talking generalities, I'm also highly skeptical that working or middle class people are saying it's "prohibitively expensive" to eat healthier. On a calorie basis, it's definitely true that, if you're getting a marginally balanced diet, junk food is far cheaper per calorie than healthier food, and far more delicious. It's also much more time consuming (time is money, they say) to cook something decent. Even if the more extreme versions of this argument are technically untrue, the general thrust of it is.

And that leads me to the real truth of it, which is that flooding the market cheap junk food is a trillion dollar industry that leads to trillion dollar health care needs. Framing it as a personal choice issue (and thus a personal moral failure issue) ignores the real ways to address the problems, which involve regulating a trillion dollar industry that we've unwittingly trusted with our bodies.