Very often, rookies come in and play great (look at guys like Nick Bosa). Putting all the best o-linemen from college would make a better line than what the Jets have. Teams are lucky to have a group of 2-3 great linemen. If the QB and WRs are all on the same page, that would be a scary good team.
I never agree with the idea that Alabama or Clemson could beat the Jets, but a team with all the best players from the country together would win a lot of games.