pfft no. It makes you MORE confident because you beat that a-hole boss on a particular level so you can strut around like you're a king.
But seriously, who cares? What are you going to do, assign all spare time socially interacting? If console gaming is your thing, go for it.
If you get to the point where you're forgetting your bodily functions, or you've gone several days without showering, yes it may be a problem.