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the supply and variety of food has nearly always been limited in some way, by money, time of preparation, availability, etc. As long as everyone has instantaneous access to a freezer full of food designed to be appealing there is always going to be a need for "artificial" means whether cultural/social or biological to limit the intake (at least for people who are genetically predisposed to gain easily) to something lower that what it will "naturally" be under these unnatural conditions.
