These sad accidents brings about the topic of hiking in exposed terrain. You will have no problems 1000 times, and the 1001st time you'll roll your ankle on a small rock and fall-off a cliff. It does not matter how accomplished of a hiker/climber you are, accidents happen. The solutions: turn around on exposed terrain or use protection. Most likely people will laugh at you for using protection on what is technically not difficult terrain even if it is very exposed.
It is also a no-win situation trying to argue this way, especially with experienced hikers who feel their skills will always prevent them from having any mishaps. If nothing happens to them, they will deride you and think you are a wuss, if you are right they may fall-off a cliff and maim themselves or die. What is the point of being right if somebody gets killed or maimed? I'd rather be wrong and be derided. So, until the end of time, people will continue falling off in exposed terrain with severe consequences.
In the Hautes-Alpes area of the french alps, there are more fatalities from casual hikes on exposed terrain than from car accidents (last I saw the stats, it may vary from year to year and new sports such as paragliding and MTB may have changed the numbers) or rock climbing or mountaineering.