No. When multiplayer is tacked on, such as in Bioshock 2 or Dead Space 2, I think it's not the developers choice of being lazy, which doesn't really make sense anyway because you're still adding something to the game, and multiplayer is just as hard as singleplayer to perfect, perhaps even more so because of the added variables.
What it is, is the publishers pressuring the developers to stick in multiplayer into otherwise single player titles because they see the success of games like Call of Duty and Battlefield and feel that a game won't succeed unless it has some form of multiplayer, which is entirely unfounded.
What it is, is the publishers pressuring the developers to stick in multiplayer into otherwise single player titles because they see the success of games like Call of Duty and Battlefield and feel that a game won't succeed unless it has some form of multiplayer, which is entirely unfounded.