IF is pretty nice. I'm in my 4th week of experimenting with it.
I definitely believe that we never evolved to have such easy access to food, and calorically dense food at that. Our body was meant to go without food for long periods at a time, with an increase in energy and mental sharpness to go hunt or find some food.
That's what I'm saying! Our ancestors went without food for long periods of time! They developed an increased energy and mental sharpness to go and acquire food.