The likelihood of survival decreases if idiots are playing on their toys and not paying attention.
Does the statement "and nothing of value was lost" apply here?
On a more topic-related note, the flight crew does not need to have attention from 100% of the passengers. Likely they would need less than 50% and hopefully at least 1-2 per row. If you are sitting there, completely not paying attention, and you don't notice the flight attendants waving their arms and shouting instructions, you will probably notice the person next to you flinging themselves forward and putting their head between their knees.
While I understand your point that the chances of survival increase if people are paying attention to authority figures / those in-the-know and actually listen to their instructions, it is naive to believe that just because someone isn't playing with some toy that they are actually paying attention. There are those that will be daydreaming out the window, dozing off or engaged in some conversation with their travel companion.
It makes sense for people to read the instructions in the seat-back pocket at least once in their life. It makes sense for people to actually listen to the flight attendants during their overview of safety procedures at least once in their life. And it makes sense for people to actually be aware of their surroundings, to at least know that something is not right and that they should seek out someone that might be able to help them (i.e. flight crew)...
In the end, no matter how many things we ban or how many rules we impose on having to pay attention, there will always be some people that will be over-prepared in a crisis and those that are under-prepared. If some crisis happens, I just hope I'm sitting next to an over-prepared person who notices I'm asleep and nudges me awake. Thank you in advance, fictional person!
It's not an optical illusion, it just looks like one. -- Phil White