You are correct, many times the QB's are from smaller schools and get a chance to "hone" their skills. Now Clemson seems to be different as Deshaun Watson and soon to be Trever Lawrence are NFL QB's. Time will tell on Lawrence, but he looks really good. But look at probably the best college program the last 10 years in Alabama, they use game managers for QB, not studs. I'll Sam Bradford, Baker Mayfield, Kyler Murray, Tom Brady, Colt McCoy, Matt Stafford, Cam Newton, Kirk Cousins, Sam Darnold, Marcus Mariota, Russell Wilson. Now the other thing we have to understand is our definition of star, elite is very high. I mean most years in the NFL, we have at least half of the starting QB's who are either in a place they have to prove themselves or are on their way out, that's leaves us only 15 QB's. We generally whittle that down to a top 5 or so. Arguably the top QB's in football, Brady (Michigan), Rodgers( Cal), Brees( Purdue), Wilson (Wisconsin)...not from exactly QB factories.