As somebody who has lost weight and kept it off for years, I agree that it comes at a price—I need to be conscious of how much I eat every day, and devote most of my calories to relatively "satisfying" food. Basically, it's the food equivalent of needing to live within a budget.
The total cost: maybe 10 minutes a day, and I have to be careful about certain indulgences. And I have to commit to this forever.
Not everybody would find this equally easy, and some people have complicating factors such as eating disorders.
My private theory—based on having "budgeted" what I eat for years—is that a lot of modern processed food is high in calories, very tasty, and not very filling. It can be surprisingly hard to fight this. I guess that this is what some people mean by a bad "food environment."
"My private theory—based on having "budgeted" what I eat for years—is that a lot of modern processed food is high in calories, very tasty, and not very filling. It can be surprisingly hard to fight this." <- Absolutely this. Policy-wise, there couldn't be a better place to start. Some would seem to advocate more shaming, marginalization, tough love, etc. and that's just absurd.
People need to realize that just because something says "healthy choice" or "light" on the package, doesn't mean it's good for you and chances are, if it's packaged and processed at all it probably isn't. Obese people don't need to go on starvation diets or hit the gym 5 hours a day, but they should be drinking water instead of soda, and purchasing food with as few ingredients listed on the package as possible, or better yet - no ingredients listed at all because it's not processed.
But, I'm told it is simple - for the vast majority of people who are overweight. Put fewer calories in than you use and the result is weight loss. Operate at a caloric deficit and the result is less weight. That is it.
Note: That is just weight loss and doesn't imply that it is healthy eating. Obviously, it should entail more, but I understand it is pretty simple physically. I was a fat kid but I got chicken pox at the age of 15 and have been the appropriate weight ever since then.