For example, dieticians would not be in business if people decided to eat in moderation; most of the things we argue about whether they are good or bad, if we ate them in moderation, the human system would not reach the point where it begins to malfunction.

This is exactly what we lack. Moderation.

But that doesn't mean we shouldn't be careful what we eat, especially when they add all sort of chemicals on the entire production chain, from land to the place where you purchase food from.