It feels like some foods have fervent followings despite contributing to things like heart disease. It's a good example of how humans get thrown off when dealing with decades long timespans of bad choices that add up, except with food we all have to eat.
I recall that when processed meats including bacon were classified as carcinogens, people basically said "screw that, it's bacon for crying out loud." I'm not sure to what extent they were joking. I personally avoid all processed meats, but to me the public sentiment over some unhealthy foods is in stark contrast to public sentiment over smoking or alcoholism.
One time I searched something to the effect of "why are potato chips unhealthy" and got back a general sentiment of "well, they're not that bad for you, as long as it's only once in a while." I feel like with this attitude it adds up over time though. It's probably not possible to pin down exactly what foods caused a heart attack, as opposed to being able to more clearly associate lung cancer with a smoking addiction.
With smoking it provides no real benefit except lessening the craving for another smoke. With unhealthy foods everyone has to eat, so maybe you'd be more forgiven for eating them than throwing away your health on something not essential to survival. Fancy ice cream parlors are the norm, and nobody is going to lobby politicians to close them down in the name of public health. It's just ice cream, served by people working out of food trucks trying to make a living. The most they do is insitute soda taxes. God forbid soda itself is banned.
Is there an illustration on how foods like potato chips affect health long-term? Something like the study that estimates every cigarette takes eleven minutes off your lifespan. There are a lot of different foods to cover though. I feel like if there was data stating every potato chip took X seconds off my lifespan it would be easier to deny myself from buying them by looking through the items at the supermarket and being able to think "17 minutes, 22 minutes."
When I think of someone beginning to smoke I imagine them being told "you're going down a path that will almost certainly kill you down the line." When I imagine someone being a regular at an artisan donut shop I imagine people asking them how the taste was.