I think a better question is "why don't we harness that behavior to make our apps 'feel' more responsive?" If we make UI for humans and humans act like that the

I think a better question is "why don't we harness that behavior to make our apps 'feel' more responsive?" If we make UI for humans and humans act like that then why not give them a reactive but non-functional button to click to "make it faster"? While waiting for a light to change at a crosswalk I feel a lot better if I can hit a button on a pole instead of just standing there feeling helpless. Even if I know the button won't do anything.