I'll join you in the befuddlement circle, HJ. Had it never occurred to them that it would slowly get hotter and hotter as they approached the desert floor mid-afternoon in mid-July? Apparently, not.
The truly alarming thing about these endless witless hikers requiring and/or demanding rescues, is that many of these folks are also driving, parenting, and voting. Now that scares me.

Q: How many therapists does it take to screw in a light bulb? A: Only one, but the light bulb has to want to change ...