There is a guy I know who is finishing up his degree after many many years. He wants start a fitness community. After fall semester he is getting his degree. He was taking biomechanics to be up-to-date in his knowledge but he is dropping it because he does not believe je will ever have to tell people about how sodium ions interact and the chemical aspects of how a muscle moves. How would you respond to something like that? I'm sure there are reasons to know that info. What would those reasons be?