That's pretty interesting. My flight instructor used to put an index card over the airspeed indicator to make you learn how to judge your flight attitude without depending on instruments. OK until you're socked in by clouds. He also threatened to start rapping knuckles with a ruler if you didn't keep the air speed up.
We still practiced stalls, both power on and power off to get a feel for how much more violently a power on stall happens. It seems that some of the general aviation spin accidents that occasionally happen are from non instrument rated pilots finding themselves in zero visibility and get into a stall which when not corrected becomes a spin. I used to know an ex Air Force instructor pilot who once had a student lose almost 20,000 feet in a spin with a T-38. Was getting ready to punch out before they recovered with several thousand feet to spare.
It's a shame about Steve but I think he must have become incapacitated. The fact that he crashed in California seems suspect as I had read that he was scouting locations in Nevada. Did he lose consciousness and kept flying West until the mountain intervened? We'll probably never know. I had another instructor who put a plane into the ground upside down 1,000 feet from the end of the runway while taking off. The FAA never could determine a cause. The strange thing was this guy had almost 10,000 hours of flight time including serving as a fighter pilot in WW II. You just never know why some of these incidents occur.