Didn't we start the Grand Final last year with Westwood punching Blake Green in the face while he was on the ground, and escaping unpunished by the officials.
If the officials are going to exert a big influence on the game, that introduces some randomness in which counts against the favourites. As Wigan beat us home and away this year, finished above us in the league, and are at home, its fair to say they have more to fear from incompetent officials than we do.
But of course maybe in the tinfoil hat world we all know that Bentham is being paid by the RFL to ensure a Saints v Wigan final.