I don't think Josh thinks about his legacy as seriously as others do. Hes in the NFL, got a hot wifey, a nice bag and considered one of the top QBs and he rolled out in the first quarter trying to throw the ball to the other team. I don't know him personally but I get the impression he wasnt as locked in ace ice cold stare, down to business Mahomes.
I'm sure the sting of the loss doesn't linger as long when every other aspect of your life is a win. When he does care about his legacy. He has an OC that runs the same exact tush push after getting stuffed.
Lets live in reality. KC is elite and prepared just a little more and it showed. You have a defense that gets a handful of stops againsts elite teams. He had to be perfect to win that game and he wasn't.