I think there’s a right way to play a game, a way of approaching the game that the developers intended for and designed around. Unfortunately, the word “right” carries certain connotations of value that I don’t think are appropriate when talking about games. If you want to play a game other than how the developer intended, you’re not wrong for doing so. You can play however you like, but you also have to admit that some games don’t cater to some play styles.
Sadly, it seems to be getting harder and harder to play some games the “right way,” especially when the “right way” involves other people. What if none of my friends have the game or want to play it? Thankfully, a game like Left 4 Dead advertises its emphasis on cooperative play, so if I suspect I won’t get the best experience because no one else I know will be playing it, I just won’t buy that game. But it’s getting harder and harder to tell, ahead of time, whether I’m going to get the best experience out of a game or not. It’s trendy to integrate social features into ostensibly single-player games, which is fine in theory, but it becomes a problem when single-player games suddenly include so many social features that it ceases to be a solo experience.