You seem to be under the assumption that people in a true emergency situation have the mental coherency to even actively consider their own safety. The reason a

You seem to be under the assumption that people in a true emergency situation have the mental coherency to even actively consider their own safety. The reason airline safety rules are so often repeated is that it gets people acting on 'automatic' without thinking about it, and even then there are various documented cases where airplane emergency survivors just sat in their seats without doing anything until someone told them to get up and off the plane.