This seems reasonable - to me at least it seems that Spurs like guys with +physical traits relative to position, and are willing to sacrifice higher level BBIQ up to a certain point to get at those traits. Like, I'm not suggesting that they're going to go after knuckleheads who can't play basketball like Kai Jones or something, but I think above a certain level of acceptable game sense, they'd rather have those physical characteristics when it's combined with high character. As it turned out, Primo did not in fact have high character, but I'm not sure that was readily apparent at the time of the draft.
To me at least, CB had high level athleticism relative to size and shooting signal, Primo was a bet on size relative to skills as a ballhandler, and Sochan was a bet on quickness relative to size - all 3 also had traits that lended themselves to being "positionless" as well, whereas other guys who were taken after them, like Sengun or Sorber, may have had better game sense but lacked the physical advantages + portability that the Spurs value. I dunno, just something I've noticed although maybe I'm connecting things that aren't necessarily related, as the Spurs did pass on Duren to take Sochan (but by then they may have already had their eyes on Wemby).
That's why I'm a little scared of Cenac - on paper he's a very modern forward - decently switchable on the perimeter, nice jumper, very good athleticism, good size to play the 4 or 5 while spacing the floor, basically everything the Spurs need, plus a ringing endorsement from Sampson who has a good eye for NBA talent and seems to think he's got a Castle-like demeanor. But I watch him and he just leaves me cold; maybe he ups his play and improves throughout the year and changes my mind by season's end.