Good teams don't draft quarterbacks because they typically already have a quarterback they've paid a lot of money to. Why would a good team be drafting a quarterback? That's the first fallacy in your argument.
The Bengals had to have the worst record in the NFL to draft Burrow. The Chargers took Herbert with the 6th pick. Are you suggesting the Cowboys bottom out and tank to draft a QB in the top 5?
And what, exactly, is it about the Bengals and Chargers situations that the Cowboys should be envious of? They're both straddling .500 and, by the way, discussions about contract extensions for both will begin within the next year or two. And, despite the fact that neither have accomplished anything yet in the NFL, both will likely get paid more than Dak. Then what?
Same goes for Mac Jones, he's a rookie who won a game last week by completing just two passes. I'm not sure why he's even in this discussion. Are you suggesting that the Cowboys should just draft ANY QB to replace Dak? Will Bill Belichick be coming along with that QB?
You gave me a list of QB's who were all drafted in the top 15-ish, as examples of what a team that will likely be drafting anywhere from pick 22-32 should do. So I'm still not quite clear on what realistic scenario you would have expected Dallas to do. The year before we extended Dak, we took Lamb in the first round. The only QB taken in the first after our pick was Jordan Love - are you suggesting we should have let Dak walk, passed on Lamb, and drafted Jordan Love? Or perhaps passed on Diggs in the second to draft Jalen Hurts? Or maybe you would have wanted us to let Dak walk last offseason, and draft Mac Jones at 12 instead of Parsons? Would that put the team in a better spot then they're in today?