Just because a QB was there, doesn't mean you have to take him. It wasn't that long ago that Goff was the must have number one QB. I'm old enough to remember when Goff and Wentz were the future of the league. Dorsey is a part of this offense and waited until the right time to draft a QB. They could also be taking a different approach and building the roster and waiting until the next Watson, Russell or Stafford become disgruntled and swoop in and grab them.