I mean you can visit Tokyo and barely notice anyone being fat while in New York there’s about 30% people being obese, even though both countries have fast food. Although Japan has less of it tending to burn off that by walking or exercise (it also reflects their lifestyle) and portion sizes regarding food & calorie intake while in US there are literally multiple fast food joints next to each other along with huge portion sizes.
Don’t throw potatoes in bad food example list, potatoes are the most satiating foods(boiled potatoes satiety index is 323%) and good source of carbs, vitamin c, b6, potassium, a little fiber, all of which support decent heart health and blood pressure and those are generally cheap as fuck and third most important food crop world wide.
Cooking method, drowned in oil, is what messes it all up, but boiled or even just oven cooked/air fried potatoes are a really good choice of carb source and should be included in a healthy diet and should be top choice when trying to lose weight due to high satiety index.
So don’t tarnish potatoes like that.