it's different with Simmons. i'm told he shoots FTs twice as good w his other hand, which happens to be his natural hand, btw.
that's why, as an advocate for his exceptional talent for longer than anyone here and for the entertainment of those who reveled in my formal Borderline Personality Disorder analysis of Kyrie Irving a coupla yrs ago, i'm going back to the diagnostic manual to suggest that Simmons might be an autistic savant - yes, like Rain Man.
i remember as far back as his LSU days, when his coach kept yelling at him to start the offense high. without a hint of it being from ego, Ben didn't stop until he was running the Tiger offense from the spot on the floor where PJTucker shoots treys.
then, in his second year with the Sixers, i'd watch him on D and sensed that, oblivious to the actual play as it occurred, he was "practicing" his peripheral vision, seeing how far he could get from the action while still being able to respond to it at shot time. this resulted in the next year him being always halfway between what was happening and what could happen, which has what has made him one of the best defensive (and THE best @ zone) players in the game.
it's literally ALL in his head. he's counting all the toothpicks but cant add 1 + 3. the terrible coaching of Brett Brown (and imperial nature of Embiid) "forced" him away from finding a two-man game with his fellow superstar when that was the natural thing; the call for him to expand out to shooting treys in his early years "forced" him to not only avoid them like the plague but actually get worse @ deuces; and the attention on his free throws has made him "want" to get worse&worse at it so that his self-concept can be just as far as possible from the public concept of him. combine that with the faraway look in his eyes and the more placidly he acts the worse it gets, and i'm pretty sure there's something dramatically Aspergerish at play making him such an assburger.