I blame the obesity epidemic on the weak ass FDA and nutrition labeling. A 'serving' is whatever the hell they feel like making it - I've seen 1/3 of a cookie, a single tick tack (rounded down to 0g sugar), and every other arbitrary amount so actually comparing products takes so much time that most dont bother. Combine this with the fact that 90% of restaurants dont even bother giving you any information at all so you have to cook or go to specific big chains to actually track calories. Also it's a safe assumption that everything at a restaurant is packed full of carbs, cheese, and oils for max calorie density.