Yeah that does seem pretty lame. That is one of the many reasons why I hate video games that seem force gamers to play online.
I mean I wouldn't mind playing as Jason in addition to the counselors, but having to play ONLY as Jason in single player mode is stupid. Especially for a guy like me who doesn't even like playing games online.
Edit: I mean in a true survival horror game you're supposed to
survive! How the hell can you be surviving when your main character is an undead serial killer who never dies?