After years of floundering, I think I'm finally getting it: You get energy by spending it. The fuel tank metaphor is completely misleading. The body supplies energy to meet demand. The tank *expands* if you use a lot of fuel. In other words, biology is fundamentally antifragile
Make it incredibly easy to do whatever you want to do. You want to design your life for the least effective, least intelligent, least conscientious version of yourself. That person is probably an idiot.