Solitary Role Playing
Mike Mearls! Laughed so much. I agree with him. I read it and never used it. As a 15 year old I could tell it didn't make any sense.I think worrying about PC or NPC motivations in B2 is a category error - the module rests on the premise that (i) the players will take their PCs on the adventure, and (ii) that the rest of the world is largely a backdrop to that adventure.
That said, here are two very different takes on B2, one closer to the OP's post, the other closer to the first paragraph of this post: Mike Mearls and Luke Crane.
The Luke Crane link doesn't work.