You have a curious impulse to try to diminish great players like Kawhi and Anthony Davis to try to prop up Boogie. It's unnecessary and a bad look. Plus your stats are wrong. Or attempt to fit them into preconceived narrative is wrong.
Like Peace said, Kawhi is 12th in RPM. Boogie is 11th. Here is the
link. It is fair conclusion based on this stat the value that Kawhi brings to his team is close approximation to value Boogie brings to his team.
Then there is offensive and defensive rating. The important thing to look at is net. Here is net point differential per 100 possessions scored and allowed over his six seasons for Kawhi:
This is incredible value and spectacular performance by Kawhi that reflects more than being part of best organization in NBA. Let's focus on this year so I can disprove your wild assertions. Kawhi has offensive rating (ORtg) of 121 and defensive rating (DRtg) of 102 for a +19. This is estimated points per 100 possessions scored and allowed when Kawhi is on the floor.
As a team the Spurs are 110.7 ORtg and 101.3 DRtg for a differential of 9.4. They are kicking butt with a 29-7 record. But they kick more butt by almost 10 points per 100 possessions with Kawhi. (19 - 9.4 = +9.6)
Now to your point: The Spurs defensive rating is 101.3. With Kawhi it is 102 (-0.7). But it only takes a hint of intuition and logic to conclude why this is so. Kawhi checks the best offensive player for the 33 MPG, usually part of the best five the opponent has to offer. For the 15 MPG he is off the floor, it coincides with lesser skilled opponents, second units and garbage time. The -0.7 difference in DRtg is buried in this.
But this differential is inconsequential relative to the net differential when Kawhi plays. Like I said Kawhi is +19 per 100 possessions while as a team the Spurs are +9.4. By contrast, Boogie is +5 (110 - 105) in offensive and defensive rating while his team is -4 (104.2 - 108) for a net of + 8.8 (5 - (-3.8)) So both guys are +9 points per 100 possessions relative to their respective teams. This is reflected in their respective RPM (real plus minus) of 11th and 12th since these numbers are derived similarly.
I won't address the beta mentality comment than to say Kawhi is 13th in scoring with 24 PPG and 61% TS on a team with an offensive not designed to be carried by one player. He also has a 1.6 assist to turnover. If Boogie was 61% TS and 1.6 in assists to turnovers, the team would be 5 games over .500 and he would be leading candidate for MVP with Westbrook.
As it stands you can make a more compelling case for Kawhi as MVP than Boogie, and this is coming from someone who readily acknowledges the strides Boogie has made to his game.