While I appreciate the logic behind this, and agree in principle, it's an overly simplistic picture.
If you decrease your calorie intake your body compensates by lowering your metabolism. Between this and the decreased metabolic burden of carrying less fat and muscle, this is why many dieters find that their weight loss plateaus after a while of making progress.
As far as low-carb diets in particular, there are also additional factors. If you get the carbs down under about 20 carbs a day you can go into ketosis, which is a wasteful metabolism. You literally piss away some 10-20% of your calories.
But the biggest benefit of low-carb is you don't have those blasted carbs (and especially sugar!) adding calories to your diet without triggering the satiated response in your brain - you just eat less on a low-carb diet, without feeling hungry.
If you decrease your calorie intake your body compensates by lowering your metabolism. Between this and the decreased metabolic burden of carrying less fat and muscle, this is why many dieters find that their weight loss plateaus after a while of making progress.
As far as low-carb diets in particular, there are also additional factors. If you get the carbs down under about 20 carbs a day you can go into ketosis, which is a wasteful metabolism. You literally piss away some 10-20% of your calories.
But the biggest benefit of low-carb is you don't have those blasted carbs (and especially sugar!) adding calories to your diet without triggering the satiated response in your brain - you just eat less on a low-carb diet, without feeling hungry.