No, it's the lack of will power, with few exceptions. Most of the food these days, even expensive food, has atrocious amount of calories, so to burn one cookie-

No, it's the lack of will power, with few exceptions. Most of the food these days, even expensive food, has atrocious amount of calories, so to burn one cookie-worth of energy one would have to do a stupid amount of weight lifting. For example, lifting a 50 lbs dumbbell 3 feet high burns just 5 calories, while a small cookie I have on my plate has 200 calories. That's 40 times to lift that dumbbell just to burn 1 cookie. Edit: or let's take a look at cheese. I've found some pretty expensive cheese in my fridge, packed into small cube boxes, because otherwise its price per pound would be offensive. So we might expect that cheese would do better than cookies. The nutrinion facts label on its reverse begins with "serving size: 2 table spoons, 120 calories" - a borderline fradulent label that's trying to hide the fact that the small chunk of cheese has 600 calories in it.