When it comes to the care and feeding of rookie quarterbacks, NFL coaches are clueless. They can beat the Tampa 2, they can create endless stunts and blitzes, they can detail the intricacies of the spread offense, but they can’t figure out how to handle a rookie QB. NFL teams spend millions of dollars on wildly successful college QBs and then they turn them over to their coaches and cross their fingers.
The NFL isn’t actually very good at coaching in general. It’s very much a copycat league that occasionally understands why things work after they’ve been effective.
You have to make the offense around your QB, you can’t really do that with a rookie as you don’t really know what they can do. It’s further complicated by teams drafting QBs that have no hope of fitting in with what a team currently does.
There’s probably a lot of coaches that would be amazing in the NFL that never get a shot because the league is so incestuous at the moment.