Why is there a bias against MP only games?

[Nautilus]

There is the example that Teeqoz provided, but for me its also a more personal issue.I am a single player person.I really dont mind if the game has multiplayer or requires internet all times(though that pisses me off).What I think that almost all games need at least is a great story with a great campain.if the game dosent have that, I feel that for me the game is simply not worth the purchase if you have to pay money for it.Of course there will always be exceptions, but thats the way I see most multiplayer only games.