Except that's false. These dudes get a boner any time the see a white pocket passer that looks somewhat competent in college. It's ingrained into the darkest recesses of their brains. They're also wrong a hell of a lot because sometimes they can't see the forest for the trees.
As an example, they made excuses for Josh Allen's completion percentage in college that offseason because he was throwing to Wyoming WRs and not NFL receivers while conveniently forgetting that he was also throwing against Wyoming-level corners too. I knew nothing else about Josh Allen because obviously I don't watch any Wyoming games, but I saw ONE stat that offseason by some website that gave a "projection" score to a QB and Allen's was negative. That's literally all it took. No QB with a negative score that was drafted in the first round ever worked out and all of the comparisons were guys like JP Losman and Kyle Boller. Sure enough Buffalo, lead by some moron who is getting 7 figures a year, trades up for him because he throws hard and what do you know? He still can't throw. Shocker. Now they're stuck with him until they can finally convince themselves that he's not it which is hopefully as long as we wasted with Tannehill.
But... but... but all the draftniks had him going in the first round!
Rosen meanwhile couldn't elevate his COLLEGE team enough to win... in a ****ing league that is basically whoever has the best QB wins, couldn't identify a middle linebacker (even though he's oh-so-smart), had multiple concussions because he was too dumb to read a defense and continually took a beating holding on to the ball so long, rubbed people the wrong way with his personality, and for some reason is a 1st rounder why? Because he has a pretty good arm even though he's football dumb.
So, you asked, and I could sure turn out to be wrong, but here's the thing. I'm only going off of what I've seen out of him for like 4 years now. You're basing everything on probable hope that he could maybe learn how to play QB all of a sudden, and mainly draft position.