Fans have a particular image of hiw different started positions should be, regardless of availability or any other factors.
Burns could never be the pass rusher that Peppers was, so he's not worth a second contract. One example
Bryce Young does fit the average mold of a starting QB, abd is the polar opposite of Cam Newton when it comes to size and strength only. So it's easy for the fans to dismiss him, because he doesn't fit their definition of a capable QB.
NEWS FLASH. neither of these players fit the prototypical size, strength, capability that most NFL fans want and desire. Yet, there also aren't enough of those prototypical players available for every team to have one, let alone be in position to aquire one.