He excels, and he will get rewarded
It's the Jerry way.
Jerry has been desperate to leave a post Jimmy football legacy to have something to show for 25 years. He wanted that to be Garrett, and nursed Garrett along for over a decade trying to make it happen.
Moore with a roaring offense would be perfectly situated to be the next Coach That Jerry Made, his legacy to the Cowboys. Moore could expect a long term contract and a lot of patience. Under the scenario of a roaring offense, any failure of the team would laid a the feet of the defense, and McCarthy already has a ding against his record in that respect for bringing in Nolan as *his guy*.
McCarthy is already on thin ice. Moore will get credit for a strong offense. So what is McCarthy bringing to the table? Not his personnel skills. Doesn't get credit for Moore. Does get blame for Nolan.
If Quinn fails, McCarthy gets the blame for Quinn. If Quinn succeeds, we're set on offense and defense *if we can keep both* for a while, and McCarthy will stand in the way of keeping Moore. Thanks for Quinn, Mike. Your second pick was great. But now you have nothing to add to the team.
Getting an offensive HC while keeping Moore may have seemed odd, but it looks like another case of training wheels for Jerry's new Coach that Jerry Made. And I think it makes sense. McCarthy brings competent experience in game management and WC offense that Moore didn't have and didn't see with Garrett. They complement each other.
Under the scenario of a great offense, the Cowboys and Jerry are a great opportunity for Moore as a HC. He looks good with the side of the ball he runs, and he's got an owner desperate for him to succeed. Next year, Moore will interview with other teams to squeeze Jerry for more money and an Assistant HC title. If the team wins a SB in 2022, Moore is the hottest HC commodity in the league and gets his pick of teams. If not, Jerry dumps McCarthy and promotes Moore to HC.
If Moore can keep the offense rolling, he's HC in 2023, with the Cowboys or elsewhere, with great terms wherever he is.