You could argue that neither does Carlisle (in terms of getting all the really spectacular potential lottery talent in the draft all these years). In fact, Mavs ignored the draft until recently and their management went a completely different way. I just admire Carlisle ability to really get the most out of whatever ingredients he has, in the middle of lack of continuity and attrition. Pop has not ever done that, since he has like I said the stars, and he has notoriously been slow to integrate guys, or figure out how to use them.
Let's not forget Timmy was a supreme talent that came ready made, Manu was already an accomplished player and something like 25. Tony was very young and might be Pop's best coaching job until Kawhi, and still Tony's game relied on his speed, and he had that god-given talent since he came in. One thing Tony could do, was "get to the hole" as they say.
Still, Pop admits it took him time, a couple years even to let Manu be Manu and to really understand how to get the best out of Manu. They fought a whole lot and Pop attempted to restrain Manu too much. Of the big 3, Manu is the one Pop never got a mold for. That just tells you Manu came ready made. Messina (or Manu's early coaches) probably had more to do with his molding.
Pop also admitted he didn't know how to use Diaw when he came in. We could infer, its in part the reason why Diaw disappeared on us his first or second season here, and went passive or AWOL when we could have used him. It's on Diaw that he is as chilled as he is, but its on the coach to figure out how to squeeze the best of Diaw and Pop did not figure Diaw out until Diaw went to the Euro, owned everyone and their mothers, dethroned Spain, captained Les Bleus and came back with a fire that Pop said: "you know what? You now have to do that for me too!!!!"

(Sidenote: I read a story where Pop asked Tony how to use Diaw better, and Tony was the one who told Pop that up until that point they never called post up plays for Boris, and yet Boris is a very good post up player).
Pop has always had the defensive coaching stuff, that is his best. But I daresay he's not the best at figuring out guys offensively or how to integrate them/feature them. I brought up Kawhi, since it took Pop until this season to really feature him and let him shine consistently. He's still growing and evolving and stuff, but it took a long time to get to this level. Look at Paul George in Indiana, there sooner.
The younger guys, possibly the lack of trust stems obviously from the unexpected performance of young players, but also because they are evolving and growing, and unlike the veterans, they are not finished products and you don't yet know what they will do well.
Pop's a winning coach and I admire him intensely, but I do think he's slow to learn how to feature and integrate guys. Lamarcus right now not the exception.