If we need to blame someone for load management, blame Popovich for introducing.
It wasn't noticed a lot during his time because Spurs had a lot of players they can rely on, with the Clippers, it was only Leonard which is his star and people are coming to watch him and without him playing, Clippers would be a different team.
Fans are there to watch Leonard as he gained a lots of popularities after sending the raptors to the finals and win the title. Regarding to the load management it's everyone's strategy and understanding, coaches and trainers always looking for long term health conditions of their stars.
We are all witnessing the difference between Clippers having Kawhai and the team without him inside.