Don't be do quick to judge: He's secured by a rope that passes through a series of bolts that are drilled into solid granite. You could lift a car with the gear he's using to secure himself.
You're less in control of your fate when passing someone on the highway than he is here. The only way he dies in this situation is first slipping off (first layer of protection is your hands and feet), and then having several layers of ridiculously redundant protection fail.