There's so much wrong with this post.
Firstly, Dak isn't even close to being in the same range as Derek Carr. Carr is regularly mentioned as mid tier to sometimes in the upper 20 range. Dak is voted as high as 6, as low as 9 - and has been for about 4 years now. Carr is mentally a midget, shrinks under pressure. McDaniels gave him lots of chances to bounce back from a bad game, and he just gets worse and worse, and has even worse games on top of bad games - and was finally benched. Dak bounced back after Tampa - won 2 straight. Bounced back after Green Bay by crushing the Vikings, and then bounced back against Jacksonville by unseating the Eagles. It's simply a different outlook than Derek Carr. Dak's strengths are usually said to be his mental acuity and reading the field.
Their results and production level isn't even close to being the same. Dak has won 12 games 3 times, 10 games 4 times. Carr has sniffed 12 wins only once, and 10 wins another time and has been .500 or below every other season. Dak has elite production in the regular season. Cowboys are always winning a ton of games every year, and that alone lifts him above the ordinary by quite a bit. You can say he's Phillip Rivers - but if you say that, you have to acknowledge that Rivers was kept for a long long time, until near retirement.
Secondly, there's much more to Carr's benching than his interceptions, a lot to do with lack of offensive production given their myriad of weapons. 0 points against the Saints, for example. And the fact that this was supposed to be the Raiders' year, their expectations were well above .500, and they fell below that mark.
Thirdly, Dak is likely to be Cowboy for life. Yes, he's gonna be here a long long time. And he's likely gonna break all records here - actually probably gonna crush them - next is all of Romo's.
I guess overall my point is that...... Jerry Jones simply doesn't share your viewpoints. He goes by the league wide opinion on his Quarterback instead of yours.