In any conflict the subconscious will always triumph, therefore the concept of willpower is largely meaningless. Any notion of overcoming subconscious resistance with conscious will is a myth.
Bicameral resonance is a much more accurate and useful concept.
We would all like to think that our conscious will is the master of our destiny but it takes only a brief introduction to the facts of life to realize that the truth is otherwise. Even if we put common experience aside, the findings from modern genetics and psychology research leave no doubt that it is time to trash this outmoded concept. It should be consigned to the semantic rubbish heap along with concepts like a flat earth, spiritual possession, ghosts, and the Easter Bunny. None of these things, including willpower, exists. Uses and meanings vary all over the map and if you thought you knew what the word meant before you looked it up, you might change your mind.