It's all about being a starting NFL QB. As one NFL owner recently said, you gotta have a legit starting QB you can consistently win with. If you don't, you have NO CHANCE. It has little to do with whether or not they can get you a Super Bowl but about giving you a shot at winning your division.
Bottom line....every team with a home drafted QB have 5 years to decide if he's their guy. If he is, he gets paid. If they can't or are not sure, then they tag him as the Commanders did with Cousin. But notice the Browns with Mayfield or Bucs with Winston or Jets with Donald. The league has pretty much said these QBs so far, aren't worthy of a long-term market value deal.
Yet we have fans/posters suggesting Dak's overpaid coz he isn't talented enough........silly