I understand the point you're making, but lets not forget that Rodgers isn't getting any younger either. I don't think it's a terrible idea to take some of the pressure off of Rodgers to be the all time great generational talent that we all know him to be every time he steps onto the field.
This isn't a suggestion to take the ball out of Rodgers' hands. It's a suggestion to make him more effective. Imagine if Rodgers had a legit back that could gain the attention of opposing defenses by drawing the box closer to the line of scrimmage, and let Rodgers use his rollout ability in playaction/misdirection and take some shots down the field either rolling to his left or to his right, or even standing still in the pocket.
Just the threat of having a healthy/productive Peterson in the backfield would likely result in Rodgers throwing up an even better season than the one that he had in 2011.
Again, the suggestion isn't to take the ball out of Rodgers' hands.
I'm trying to make this offense more difficult to defend. Not ensure that Rodgers continues throwing the ball at the rate he had to throw it last year.
The Patriots change their run/pass dynamics all the time. Yes it's the same system, but different gameplans depending upon the personnel. That's why the Patriots are so good. They can adjust from year to year.
If we can get one great year out of Peterson and have a chance to win a Super Bowl, sign me up. We'll worry about 2018 when it gets here. The NFL is a win now league, especially when you have a 33 year old Aaron Rodgers that has only been able to get you one Super Bowl, in no small part due to maintaining the status quo.
The risk v.s. potential reward in this instance I feel like is too great to ignore. JMO.