He missed all but 9 games this season, because on an overuse injury, not sure what's your point.
The point is that the overuse was probably the result of all of the additional training he does outside of the Spurs facility. It's not from the 34 minutes a game that he is out there playing in actual games. Blaming Pop is an easy excuse but the fact is he pushed himself way beyond what he should have on his own. It's not his fault either, he was striving to be the best. Can't blame him for that.