Yep, I would not suggest anyone take up a diet of pure sugar, only that if you are trying to use science to set your diet we aren't really confident, at the level of macros, about what makes a difference, but we are very confident about excess calories.
The way you are wording your comments, someone could come away feeling like these things aren’t really worth considering.
It’s like, your comments to me seem like you are technically correct but a person reading them might think “ok, this smart person said the Atkins diet doesn’t really work, it’s all sleight of hand.”
That could be counter productive, because the Atkins diet really DOES work for some people. Proving that it’s likely not working for the reason people think it is can be helpful for accuracy’s sake, but depending on delivery can just become discouraging.
The missing point is these interventions really can be effective. Why they are effective is more of an intellectual exercise.
It’s obviously not true that for any given set of calories consumed the body has only one option of what to do with them. It can build muscle, store fat, repair heart walls, excrete it, and so forth.
This is determined by a bunch of factors including hormones. So if hormonal balance or other metabolic behavior is modulated by macro (or micro) nutrient intake, then the calorie emphasis might be overly simplistic.