Burrow and Herbert are more traditional picket passers who had success at the college level. They both throw a very pretty ball and run traditional NFL offenses. Coaches and GMs understand how they are doing what they are doing, so they can project that success going forward. Burrow gets love from fans because people saw him dominate in college. Also, people don't have to admit that they were wrong in praising Burrow; he was a can't-miss prospect who is making everyone's projections come to fruition.
Even after what he did in those two playoff games, a lot of people can't believe what they are seeing with Josh. It defies everything they know about scouting and player development. They say that you can't teach accuracy. Well, he's well over 60% now and he threw only 4 incomplete passes in a playoff game. Even the way he players defies belief. He can run like Cam but he throws like Mahomes. This should not be possible. So, in order to admit that Josh is better than BUrrow or Herbert NFL scouts and GM's would have to admit that the entire way that they scout and evaluate players is wrong. Think about it from their point of view. If you are a GM or a coach on a team that needs a QB, do you want to think that the path to success is to take the top QB in the SEC or PAC12, or go out and find a unicorn and hope he develops?