I'm really confused by the concept of a button showing me what a button should do All of the time because if that button is showing me what the button should do then that button is indicating to me that that button is doing what that button is doing not what the button should be doing. That's why there is a hover over state if you're using a mouse things become more complicated when you're using touch which is why I think the button should not communicate what the button should do when interacted with but the current state.