That is first order thinking. If eating fat satisfies you for longer than salty carbs, the net calories will be better. If it keeps your insulin levels steadi

That is first order thinking. If eating fat satisfies you for longer than salty carbs, the net calories will be better. If it keeps your insulin levels steadier, it will effect calorie absorption. And so on. Humans are not bunsen burners: we are impossibly complicated chemical systems with massive reflexivity built into them.