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How much you can "get away with" even from one pitch to the next. You get the impression that a Bartolo Colon is walking on the side of an ice mountain - that a half step over to the right would be his demise, but he's fine with brushing that edge by an inch.
Iwakuma of course has this "pitchability" but it seems to take him 5 starts per injury to get his dart-throwing motion back into "bullseye" mode.
.....
Best case scenario, Taijuan locked in this sense of danger and that's why he was throwing his splits outside the zone in September ...