My new avatar explained

[Duty]

I think most bad habits have good reasons. Meaning, the habits themselves are good, but what they have been applied to is perhaps not. For example, we have bodies that protect against malnutrition, therefore eating habits that might be beneficial in scarcity are problematic in surplus. You mentioned gluttony; I would argue that the habit itself isn't the problem, its the easy access to excess food.

You may well be right in a way RE habits of all kinds having "useful" roots, but I would argue that's basically irrelevant in the here and now due to the fact we live in an environment which modifies and interacts with our biological drives and so to separate the one from the other (innate drives vs environmental influence) on this topic would be unrealistic.

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Cool story?

Needs more dragons.