Patrick Mahomes, Kyler Murray and Deshaun Watson were 22 entering the NFL, Carson Wentz and Baker Mayfield were 23. Joe Burrow is 23. The best young QBs in the NFL, with the exception of one, were all similar age to Joe Burrow.
Just clarifying that the age issue might be a mistake, I know you like the top QBs in this draft, including Burrow.
Watson and Mahomes were 21 - both turned 22 in September 2017. Burrow will turn 24 in December.
That's not to say Burrow will be a bust because he's older, but 2 years does matter imo.