SGA led the league in Winshares. Now Jokic did have a better on/off differential, but SGA was still an elite +11.1 and the Thunder won 18 more games, which is more than Utah won in the entire season.
And I know the Thunder are a deep team, but Murray is the 3rd best player on those teams and Chet played in only 32 on the year and they only had 4 players hit 70 games so they weren't the picture of health.
Jokic is a better player, but SGA was the MVP this year.