So a signal would have helped. You give specific itineraries and exit times. Others always hike with one or more friends. Everyone has their methods. It is the lone hiker with a variable itinerary who is really difficult to track down.
A signal would have helped. An itinerary would have helped. Stopping sooner would have helped.
He chose not to pin a Spot to his pack, knowingly. Perhaps if he would have been inclined to a lot of choices, the outcome would have been different. I just contend that even something simpler than a SPOT would have changed things.
You can keep your opinion, pin on your SPOT, but do not be misled into thinking that everyone will be saved by the button.