I honestly don't see how Hauser is any worse than Max Struss who just got a huge contract from Cleveland. Or even Duncan Robinson.
Shot 42% from 3 during the season was decent at defense. Sure he can't create shots. But run him off screens to get 3's or put him out there with ball handlers to sit in the corner.
Mazzulla should've played him more in the playoffs when we were struggling from 3.
While I admire what Hauser can do, I do see his limitations offensively.
Struss can actually pump fake from three, put the ball on the floor, and drive hard to the basket. He's shown a propensity for drawing fouls at the rim, or even dunking in traffic. Sam isn't that kind of player.
Robinson may not create his own offense with the dribble but he's an old-man's-game savant. He's deadly from three, but if his man closes out quickly he can also pump fake, and side-step the closer and put up the jumper after taking the dribble.
Or, if the closer can stay relatively close to him by not leaping past him on the initial block attempt, Robinson will pump-fake-dribble and then pump-fake again. This time the recovering defender (who's probably coming at him sideways now) more than likely will elevate for the block. Here's where Robinson will pass-and-cut for a backdoor layup (if his teammate will make the pass).
I'd say 18-20% of Robinson's shot attempts come from backdoor layups. He's like a mini-version of the old Princeton offense. You either shoot a three, or layup. No in between.