It would absolutely be a terrible diet, and I'm in no way suggesting that it's just as good as properly balanced meals - I was purely using it as an extreme example on the issue people have with accepting that CICO is valid regardless of where the calories are coming from. There seems to be a common association of a "calorie" being a physical substance, leading people to think that a calorie from fruits is somehow smaller than a calorie from chips, so you won't gain weight eating excessive amounts of fruits vs excessive amounts of chips. I appreciate you inserting some biology into things with your explanation. Terrible eating habits are possible at any weight, and a  1001  busing your body while still being skinny isn't something to be commended.