No easy answers, but I agree with their instructor. If an active shooter comes into the room I don't think pissing them off more is really relevant, they are already there to kill you. But I question the logic of teaching this to a 6 year old. 11, yea that starts to make sense. But again there is no answer for every situation and child. It's like the MSF course, the beginner class teaches you rules to follow...but we all can poke major holes in their rules with our experience...situations where their rule is wrong.
This is the same, it isn't rules to follow, it is a way of thinking.