I never understand the thermodynamics argument in terms of weight gain. Surely you acknowledge that some solar cells and mechanical engines are more efficient than others?

Additionally, do you acknowledge that some drives are more irresistible than others? Can you hold your breath until you pass out?

Is it so hard to imagine these drives might differ from person to person? I fully acknowledge that, irrespective of your body's efficiency, if you could ignore your drive magically, you would lose weight with no problem, but that is far from a useful endpoint because the drive matters.