NFL GMs feel the QB is the most important position towards achieving NFL team success. They have the largest share of responsibility towards team success and are paid the largest share of the teams finances. This is a standard part of being the starting QB in the NFL.
Everything else is window dressing. Downplaying or minimizing the QB's role in team success is simple economics.
He can either perform his job well without having to have an all star cast at most positions or he can't.
Dak Prescott is no different.
He is on year 7 and if not for this year's early season team defense and backup QB play and playcalling for the first half of the season, this team would not be where it's at based on his inconsistent performance.
He peaked as a rookie unfortunately. His oline , rookie RB and his own ability to run were the main contributors to that success.
None of those contributors are as effective anymore. Nor is he.
To give him the Jason Garrett 10 year learning plan treatment is stupid at this point.
He needs extreme, as in historical support, from both the defense and running game to ever taste any postseason success.
He's a complimentary QB.
Not an elite one whose performance can carry a team regardless of other team warts.