Depends how you look at it. You are paying Aaron Rodgers type money to a guy that really hasn't proven he can be that type of focal point quarterback and in the long run is going to hurt what made your team great: defense and an elite running game. Which are going to suffer due to cost constraints.
Can Wilson be the type of QB that can take a less then elite defense and a less then elite running game to the Super Bowl? I personally don't think so.
I also don't think Seattle had much of a choice either because the alternative to signing Wilson was worse.
Unlike the NBA, I think we overvalue players in the NFL. Even Brady would not have won the Super Bowl without that great defense. People think that a QB is the engine for the team. In reality, he is just a conveyer belt that works well if he other talented parts.
I'd argue that Manning, Marino, Luck, and Rodgers are a rare class that make up for deficiencies on the other parts of their teams. Montana, Brady, and Wilson are very good but I believe they succeed better in a good system rather than being the one who can play in any system.