I'm not sure what you're getting at here. Here's some other activities that could be described as button mashing:
Playing the piano
Data entry
Writing a novel
Playing a fighting game
Playing an action game
Playing Missile Command
Responding to a post on a message board.
Playing the crappy "Test Your Might" minigame in Mortal Kombat
and many many others...
Are all of these supposed to be of equal enjoyment to all people because they use similar methods of input? 1st person combat with 1:1 input to action ration with low latency and attack collision detection is not the same as third person combat with autocombos, coolddowns, target locks and pure stat calculated combat resolution.
i agree, it has been said many many times, doesnt sink in i guess