Sometimes you get tired of single player.
Sometimes you get tired of multiplayer.
If you get too much of either, they can get boring. Is it more fun to watch a movie together with others? Or does it take away your attention from whats happening at the screen?
There are positive and negative sides to both. But with a multiplayer game, you depend on someone else to be a good a player as you. If not it will suck. And if the other players are better than you, yuo will die and not have much fun playing.
I think those boys should play a game before they speak.