But that is just one of many ways.
It is more like people rather have instant gratification. Eating a hamburger is a lot faster and easier than it is to cook your own soup without adding extra salt or sugar to taste. Which is much like exercising. Most people want instant gratification in losing weight or building bulk, otherwise they stop. If these people don't lose 20+ pounds in a month, they complain (when you should really only be losing 2 pounds a week at a steady pace.)