You said this like it was incidental, but that's exactly how the team is built. The utility of playing Murray at starting PG and Anderson at SF and running LMA and Pau in the front court is to dominate the boards. Guys like Murray, Green and Anderson generate a lot of lose balls, which a number of other players being decent or good in that area as well. Obviously, Kawhi would just take all this to another level.
Anyway, Pop's whole plan to beat the Warriors has always revolved around getting more possessions or attempts than GS in order to offset the efficiency gap. Obviously, winning the FT disparity is also a big part of that, and without looking at the numbers, I'd say that usually do that. It would be even more blatant if Kawhi were playing. Outside of FTA, though, Wolves game was not an example of the Spurs getting lucky; it was an example of their gameplan working.