I agree.
I'm what you would class a quiet player. I just push the buttons and give the machine an occasional nudge. I never understood the whole slapping, pushing, thumping, shaking thing. To me it just looks like the players frustration is being displayed and it's not actually used to benefit the players score. I can't stand it when I see people physically shaking the machine when playing a game. To think those legs are only attached via plates to wood supporting a heavy machine. I don't think they were designed for that or else they would have some sort of suspension system.
But what do I know? I'm a crap player anyway.