It's clearly true to people who actually remember his performance and don't just act like his good/decent moments carry the day. Murry hasn't been good, and all that bull people try to peddle about DeJounte's record doesn't actually matter. The Spurs are great at compensating, especially in designated rest games. It's been that way for a half-dozen years now.
Because he wasn't good enough. Even when Murray starts, Mills gets the bulk of the minutes and all of the crunch-time reps. That should tell you that Pop thinks Murray is definitely worse. You can disagree with him (how, I don't know), but it's obvious that DeJounte is not a good player held down but a bit player who's shown flashes.
I feel like I've been dropped in some alternate reality where Pop hasn't actually been Pop over the years. We're talking about a dude who's played a three-PG lineup before. The same dude who was gushing about a Parker/Kidd starting back court. The guy who had the Parker/Ford "Proto-death Lineup". It doesn't matter what the he sees Murray as. He'd play two PGs together if that is what gave him the best chance to win. , he often closes with his two best play-making guards as it is, and damned sure did that before those two got old.
Pop can be wrong, and DeJounte could be the missing piece to this year's puzzle if only he got starting minutes. I wouldn't believe that for a second, but I've been wrong before. But , to act like Pop would stick to this whole "he's a PG and thus will only play PG minutes even if there are two-guard minutes available" idea comes out of Spurs fanfiction.