Look at Minnesota last year. They had less 3pt shooters than the Jazz, yet they had a guy like Wiggins who could score efficiently due to his ability to attack the rim.
Or Jimmy Butler in Chicago.
The PF taking 2 extra steps out to the 3pt line in offensive sets isnt going to greatly change the way Rubio, HOod, or Ingles are able to get to the basket. It would help Gobert out, but it wouldn't solve the two core issues that plagues the offense currently.
And again, the Jazz have two very good 3pt shooters in the starting lineup. It's not like we are completely void of shooting. We have the ability to space the floor at an adequate level to at least have an average, or slightly below average, offense.