I believe there is a lot of truth to what you are saying. The number one consideration for the coach of the Cowboys isn't will he be a great coach who can get this team to a Super Bowl, but can he work with Jerry and limit Jerry from being Jerry.
Its a difficult task. Jerry has to be comfortable, and like a child, feel like he is in charge, when he really can't be because he is not good at his job.
Once upon a time I thought Garrett could be that guy. But then the disastrous 2013 off season occurred, which I believe was one of the worst in recent history.
I said it at the time, Garrett needed to beat the Commanders to validate the process. When he failed to do so, Jerry gave up on doing it his way, started consulting the likes of Lacewell again, and proceeded to install the worst defense in NFL history.