But I had that "willpower" for decades and didn't lose much weight. Certainly "pushing harder" didn't change anything.
And then flicking one little switch made it super easy with no willpower involved. So I just don't see how the willpower is related to losing fat.
Do have to add - it's impressive that you went through all these documented efforts. In the name of science and all that.
2) I didn't lose the weight on keto. I did keto for 7 years and managed to gain 100lbs back while on keto. This fat loss is very recent, and while it's still a ketogenic diet, it really is some magic little switch that I've flicked - I just don't know (yet) which one :)