I could take the time to demonstrate how few 4+ round QBs have become starters, let alone "great" QBs. The chances that you will get a great one in late rounds or even in the 4th (I was being nice to you giving you a middle round, the 4th -- you could have also cited Kirk Cousins, although he is only marginally good) is tiny, and not something you should bank on should your team need a franchise QB. That's the main point here, and I am right. Trading down only makes sense if you can get your QB in the early rounds, and banking on hitting the late round lottery is foolish.
Yep, I moved them first to help you, and now I'll move them back again to where this conversation started. FIFTH ROUND OR LATER. Fourth is literally the middle round. Btw, Allen has double the rushing yards of Dak in 20 fewer games while posting similar passing stats. Allen's QB rating in the playoffs is 106, while Dak's is 88, and that is the most important difference between the two: when it's playoff time, Allen is at his best. That's greatness. Dak's biggest issue has always been the playoffs, which makes him good, not great.