When you prepare fresh food you can control how much sugar and salt is involved in the cooking process. This is a good way to reduce the chances of high blood pressure and diabetis.
The advantages are health, and wellness, even healing. The disadvantage, is that it doesn't have a long shelf life, sometimes it can go bad and if you eat it, you can get very ill or worse from it. We all need food, so there is always going to be a market for it. But, if the market shifts, then people are stuck, that would be bad. Hope this helps, good luck to you.