Instead of getting too far ahead of ourselves (battling AIs, hightech helmet visors, etc.) maybe it's a more mundane reason, they are afraid of having their pla

Instead of getting too far ahead of ourselves (battling AIs, hightech helmet visors, etc.) maybe it's a more mundane reason, they are afraid of having their playbooks hacked. A physical paper binder goes missing and people notice. Someone gains a backdoor into your iPad and it might not ever be reported. Or as Anechoic describes it, they don't want information leaked before it goes on air. Humans still play football. They are free to change the play during the snap (which is what audibles are for) and even invent new ones on the field. I've never had a chess piece or even a Starcraft trooper decide to just get up and walk in a different direction. It took a roomful of supercomputer to defeat 1 human in a chessmatch. Imagine what would be required to anticipate the moves of 22 of them.