That's a bit of a stretch even for armchair quarterbacking. If you haven't seen the location or known their intent you have no idea why or how they ended up there. I've been many places where a very steep ledge (not that steep matters) is where you can get a view to get your bearings, get a cell phone signal, where you can get out in the open to be seen by rescuers, where you can catch a breeze, cool off, etc. I'm sure there was an element of the steep ledge being the end of the road as well, in other words, they couldn't go any further so they stopped there to regroup and perhaps wisely decided to stay put.Sounds like a good idea. Go onto ”very steep ledge” whilst lost.
Reportedly, the guy is Combat Engineer with recent experience enforcing foreign policy.
Sounds like the military failed teaching him common sense.
It's a tragedy we don't know the specifics of. No need to question his common sense if you weren't in his shoes.