It was this.
I remember going to the jazz scrimmage last summer (it was all the younger guys.... No Burks, Hayward, favors, or kanter) and noticing how the players all responded to and followed Gobert.
When the game was not going on Gobert was loose and having fun and the center of the other players attention.
Then the whistle would blow, the game would begin and Rudy was all business..... And he teammates followed his example.
He was covering so much ground defensively and making his teammates better defensively. Constantly communication and directing his teammates. And they seemed to love being directed by him
Then there was that game during the regular season when Gobert literally pushed kanter to try to get him into the correct position on defense.
Gobert is the leader of this team and makes the whole team look good defensively.
Favors is a really good defensive player too but remember the year before with favors starting almost all 82 games the jazz were dead last In the league defensively.
Subtract favors from that team and add Gobert. I guarantee we are not dead last in defense. We still would have had a crappy record but we would not have been dead last in defense.
Gobert would never allow it