I agree with you, but this is how it gets reported.Any sane person with normal instincts ducks when they see or sense a blow coming to the head. It's a reflex action, not even requiring a decision. Like try have someone (your partner?!) pretend to hit you unexpectedly sometime. Cameron's arm was swinging violently at Shai.
Later I saw similar actions on both Jack R and Tom Lynch, not even a free.
'Jezza' plays for Geelong, and is an acknowledged superstar of the game, he can do no wrong.