Because it's not just about the calories. Among other things, insulin spikes caused by carbohydrates influence how the body stores/doesn't store fat/sugars. Y

Because it's not just about the calories. Among other things, insulin spikes caused by carbohydrates influence how the body stores/doesn't store fat/sugars. You can eat the same amount of calories in fat and carbs and your body will decide to do different things for both cases.