You are using logic to reason with. Jerry does not follow logical thinking, esp when it comes to winning at all cost.
Jerry's top priority is to be a rock star, constantly doing interviews, constantly speaking like he's the hc (jerry IS our phantom hc btw), constantly remaining in the spotlight. Jerry, not Zeke or Dak is the face of this franchise. To relinquish control to a hc or gm is not an option on the table (i.e., even after 25 straight seasons w/o a deep playoff run) and it will never happen. To give up control is to give up his rock star status and take a back seat. His billions bought him a platform to launch his pseudo rock star act and post Jimmy he has played that role to the hilt.
You see, Jerry playing rock star, playing gm, playing hc, and micromanaging every facet of this org is his top priority, winning be damned. Well, a quarter of a century of playoff futility is not enough incentive for our Johnny Walker Blue soaked owner to try something different. If you think he will relinquish his rock star platform then you havent been watching as close as hardcore fans. Jerry may hire a strong hc who like Parcells can hire his own staff, but you can take it to the bank that the next hc will NOT have in his contract that they have final say in football matters. Only Jimmy had that in his contract, but then again he knew Jerry before getting hired and now we know why he insisted on having it explicitly written in his contract.
I'm afraid that Jerry has a "Til death do us part" pact with the fans, signed in blood with hubris as its foundation. We will never get a top notch coaching staff, will never get a hc with control. We will see the illusion of control relinquished, but the past quarter of a century says it's fool's gold. Now who wants to buy season tickets, jersey, and Cowboy's swag?