There are so many inaccuracies in that post that it actually took three different posts for me to respond to all of them. If the draft were held today, Prescott would obviously go in the top 5. Personnel people are asking themselves what went wrong. I'm generalizing, but in their analysis of his accuracy in college, the experts effectively lumped all of his attempts together without considering how bad his pass protection was. They were treating his attempts just like any other QB's attempts.
What they didn't factor in was that his poor pass protection often forced him to make throws that his peers didn't have to make nearly as often. As a result, he ended up with one of the
lowest percentage of attempts to open receivers of his draft class. It's important to note that this doesn't mean "wide open," but with at least one step of separation. The draft class average for accuracy on passes to receivers with
exactly one step of separation was 49.8 percent, so we're not talking about easy throws. On these throws, Prescott was 12.9 percent better than his class, at 62.7 percent.
That isn't simple completion percentage, it's the percentage of attempts that were perfectly thrown “in-stride,” or that hit the receiver between the numbers. This should have clued teams in that he would be very good with average protection. At 6-20 yards, he was especially deadly, also leading his draft class. As a Cowboy he got better than average protection, and predictably, he tore up the league on intermediate throws in his rookie season.
https://www.profootballfocus.com/draft-daily-what-did-we-miss-on-dak-prescott/