Wilson can "will his team to a couple victories a year" with his play. He IS a key cog in that offense — his ability to run and make good decisions with the football is one of the reasons his offense is as efficient as it is. Marshawn Lynch became a more effective running back after Wilson became the starter. That running game can be effective despite starting spare parts because teams are worried about Wilson on the play-action.
Wilson is what people like Ron Jaworski was hoping Colin Kaepernick can become two years from now. There are more ways to take over a football game and will your team to victory than throwing for 400 yards.
Wilson's escapability is his biggest assett IMO. It's uncanny how he can make pash rushers whiff on a consistant basis. He keeps plays alive that in most cases should be a gimme sack. If you lose contain on him he will hurt you with his legs. He can make enough throws to keep defenses honest. The Seahawks offense is designed to play to these strengths which makes Wilson effective at what he does best.