The two sides of this argument always talk past each other. As someone who lost 100lbs I'm sure you know this but lots of people don't.
* Calories in vs. calories out is 100% what determines how much weight you gain or lose.
* Your macronutrient ratios determine how that weight is partitioned (muscle vs fat) and have some control over hormones that contribute to hunger, like leptin.
The end result is that cutting out carbs can help people get to a calorie deficit without feeling hungry like they would on a "standard" low fat diet.
* Calories in vs. calories out is 100% what determines how much weight you gain or lose.
* Your macronutrient ratios determine how that weight is partitioned (muscle vs fat) and have some control over hormones that contribute to hunger, like leptin.
The end result is that cutting out carbs can help people get to a calorie deficit without feeling hungry like they would on a "standard" low fat diet.