It's funny how people think "just not turning the ball over" is such an easy thing. Like guys that "just don't turn the ball over" are sitting around in free agency every year. Funny, with how easy it is to find guys who "just don't turn the ball over", so many NFL teams have QBs that turn the ball over so often.
This guy sounds like a guy who is really good at fantasy football and thinks that somehow relates to professional football. What he ignores is the impact Wilson has on other guys on the team. You heard Carroll's comments after a game this year, "You guys can come in tomorrow if you want, you know the QB will be there" (something to that effect). With as competitive as guys like Earl & Sherm are, you don't think they showed up that next day?
Carroll is a players coach. That approach doesn't work without the leader of the team buying in 150%. With that said, I really doubt there are more than a small handful of guys that could have won a SB with Seattle last year. Maybe Brady, maybe Manning, maybe Brees, and that, honestly, might be it.