Well, there's a difference between how they execute that same thing over and over (believe me, for any game when you don't play it, what players do might seem the same moves, but when you play you'll feel that every second is different.)... Though maybe some of them are just addicted.
Anyway, gaming industry is driven by what's popular rather than what's smart or innovative, every few months there'll be a new popular game, but soon people would want something different and they'll find it.
That's what I think though, I partly agree with you~