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?
I was simply providing examples of quarterbacks drafted to teams with a current winning record so as to quash the myth that it's supposedly impossible to draft a QB and win.
Next years draft has already been written off as having a poor selection of quarterbacks but one or two usually show up from the clouds during the season, Joe Burrow a classic example.
QB scouts are paid a lot of money to assess talent and then the front office assesses the individual personality. Allow them to do their job. You will likely bring up Paxton Lynch (we never know how well he would have on this offense - Denver haven't had a good QB since Peyton and even he was dog meat in his last season) and bang on about the QB busts...that's because they mostly join dumpster fires.
My scenario and I mentioned this at the time, would have been to have offered Prescott and a second for the Chargers' pick and Dallas selects Herbert. I remember Catch was huge on Herbert and I wasn't far behind his confidence. I was sure in my mind he was the best QB in the draft. He was still available at #6. People will say why would the Chargers go for that well they would have got a QB with a winning record and fancy stats in the NFL. We miss out on Diggs but I'm not as high on him as most people as he blows assignments to make the picks that he does. Worst case scenario we would have to give them our first and miss out on Lamb. Painful but we still have Cooper and Gallup plus we would have drafted a good receiver in the later rounds last year as there were plenty available, e.g, Gabriel Davis in the 4th round.
Equally we needed to have signed Prescott earlier in any event and without a no trade clause so the front office retained the power and could send him wherever. Imagine this roster with Herbert and Parsons on rookie contracts plus we should have TJ Watt but that's a story for another day. Again most people on here called that and knew Taco would be a major bust. The front office have basically screwed the team over. I previously stated that we either sign Prescott early so he could be traded if needed or not at all. The front office left it so late yet they kept him, paid him what he wanted and with a no trade clause AFTER a serious leg injury for a dual threat QB! You couldn't make it up. I'm left having to look at his gormless face after he ***** up on the sidelines for the next 2-3 years.
So to answer your question, we can't do much now regardless. There's no point signing a vet or drafting a QB as we are still knee capped with the Prescott contract and good grief nobody would want to trade for him post injury and on his current deal unless we do what the Rams did with Goff. Even then, Prescott has a no trade clause! We are stuck with Dak Prescott at QB for the next few years which kills me inside when you consider the wasted talent with the likes of Parsons on rookie contracts and with so many pieces in place for a Superbowl run.