It's a deeper problem than that, sadly. It's not that DJ "need to setup Poeltl better" - he needs to set everyone up better. He's still not good at it; he's been great at scoring this season, his midrange pullup and crossover are pretty unstoppable when he's on, but he still really struggles getting the team into any sort of offensive sets that don't involve him directly attacking the rim and either scoring rainbow shots, or kicking out at the last minute for an outside shot. , he struggles with basic entry passes to DDR/LMA, which are often picked... White is miles better setting Jak up, because he's a miles better and more natural playmaker, for everyone in the court. But he has his own problems... And I agree with most that it's starting to look untenable to have them both starting games, at least with our current roster configuration.
So many of the problems would be made easier by taking DDR out of the picture... We could play everyone at their natural positions, for one. But of course, there's a talent and scoring vacuum left there, in a team already struggling for both. In any case, the Spurs have far more pressing needs to address than a "spoon-fed" center, which is weirdly what everyone on this board has chosen to fixate on this year. At least last season, the Forbes critique was understandable and justified... This season it's looking mighty obvious what a scapegoating attempt it is. There's just bigger issues: DJ-DW looking offensively impaired when together, Keldon not being a PF yet being slotted as one (and being figured out by other teams, which hopefully is him just hitting the sop re wall), all three of these players being unreliable outside shooters, and all made worse due to DeRozan's lack of defense and outside shooting whilst being the "pillar of the team". Jakob is, at most, a fourth problem in terms of importance, IMO.
Depressing to write, really, and I really think Pop is making the team look worse than it is. But right now, I don't think there's much rebuttal to anything I've written there.