He's not right?
Why then why don't you state your counter opinion? Why is Bob wrong? If you think you know the objective of oddsmakers, why don't you just come out and say that it is?
According to the link that Code Monkey posted, this is what the oddsmakers strive for… it sound pretty similar to what Bob Chalmers said:
"Now, if a bookmakers job was solely to predict the final score of a game, we could safely state that they aren’t getting any better at their jobs. But that’s not their job. Instead, they’re trying to manage to a balanced book so correctly predicting the final score differential is a distant second to ensuring their line generates equal betting action on both sides of the game. It’s irrelevant to the bookmaker if the final score makes that point spread look ‘wrong’ by 5, 10 or 20 points."