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 just the fact - eating in moderation will do us a lot of good. But sadly, some of us would want to consume a whole chicken at once with bottles of drinks to flush it down. Thereby causing harm to our system. In fact it's food abuse, lol.