This is a trick question in the vein of a couple of famous ones from the Doc Rivers era, like; "why is every play a Paul Pierce ISO?", "why is every play a screen for Ray Allen?", or "why does Rajon Rondo dribble the ball for twenty seconds at the top of the key on every possession?"
None of those questions represent reality. Nor, does the one you asked about Kelly Olynyk. I saw him catch the ball in the low post, I saw him catch it in the high post, I saw him get the ball in transition, I've seen him get the ball in both screen and rolls and screen and pops, and, yes, I also saw him get the ball out above the three point line on occasion.