Most importantly I DON'T think this is true, but if it is true, I think the answer is obvious:
If you're Russell Wilson and you're 30 years old why would you want to be stuck in this offense?
Wilson was 3rd in the NFL in QB rating and the Seahawks were last in the NFL in pass attempts per game.
Everyone else down in the bottom for pass attempts is running a lot because their QBs suck. The Seahawks are doing it as a matter of philosophy. Wilson's rating is nearly 20 points higher than two of the other guys in the bottom five for pass attempts, and more than 40 points higher than the other two. That's insane. Two guys with QB ratings in the 60s got to take more pass attempts per game than Wilson last year.
While the rest of the NFL is incorporating air raid schemes to make their mediocre QBs look very good, you're running stone age passing concepts when you're even allowed to throw. Why would any wildly talented QB want to spend their last prime years just handing the ball off over and over again?
Again, I think he stays, but if he wants to go that's the answer IMO.