The Spurs have made it clear that they are rebuilding. Despite having ample cap space, they have essentially refused to make any meaningful additions to replace Dejounte Murray or bring some experience to a very green roster. Their biggest move was signing Keldon Johnson to an extension, which suggests they simply want to build around the young core.
With the focus set on development and no pressure to win in the short term, the next step could be to move the veterans currently on the roster. Jakob Poeltl, Doug McDermott, and Josh Richardson likely won’t be around for the next playoff trip, so why give them minutes that could be going to others instead of moving them for picks?