Well, yes, they are part of the story. But this does not mean mean that calories from carbs, are the same as calories from protein or fat. This simplistic assumption is why low-calorie diets fail.

Low-carb, is not low-calorie, nor high-calorie, it's an entirely different way of looking at nutrition, that focuses on understanding how our bodies respond to different nutrients by understanding the biochemistry involved in the process.

Wa'il