If he's a project that's going to require sitting and learning for a couple years, he's not a top overall pick, let alone one you give up a ton of additional draft value to move up and get.
That's why Goff has been a losing argument either way where Lynch has not.
The only way the Goff argument is a winner is if he comes in and shows he's the kind of transformational QB a team should give up that kind of value to get. Those kind of QB's are better than the Case Keenum's of the world immediately. Goff isn't one of those. But maybe he's still going to develop into a pretty good player. He better. And, of course, maybe Lynch still will too.