Suppose the team's favorite QB is Mahomes, and they have him ranked as the 20th player on their board.
They figure it's smart business to acquire more picks, so they drop back to, say, 18th, figuring that he'll still be available.
Now suppose that they aren't alone in having Mahomes as their QB1, and a team like Arizona takes him at 13 to groom behind Palmer.
That's a bad day at the office--losing out on your preferred option in the name of garnering more picks.
A waste?
Get the right QB and the remainder of the "holes" on this team will matter a whole lot less.
Drafting to fill holes is how teams end up reaching.