>"I highly doubt an entire scouting group is going to get into a survival situation together"
I'm not sure if that thought came from the essay or the from another poster, but I agree with Bob, Scout groups can get in trouble. I was a serious caver for a number of years and have reviewed all the caving accidents every year since. There's a certain flavor of a scout trip gone wrong versus "spelunkers" (what cavers call unexperienced people) versus cavers from an NSS Grotto.
The NSS cavers are much, much likely to self-rescue despite being on more expeditionary trips.
The spelunkers are much more likely to have very substandard equipment (less than a light per person versus cavers with three per person, etc, etc), no experience, and often with sex, drugs and rock&roll involved.
The Scout groups, as Bob mentioned, can be lead by someone who had a half-baked idea and with completely good intentions leads another father and 8 boys when really, that guy should have gotten much more experience first, himself, so he could pick a more reasonable first effort. Then when things start to go wrong - rising water, a stuck kid, overdue, lights giving out, etc - as a group they don't have the reserves of a caving group - a group that goes out regularly splits up rescue gear, knows each other's limits and agrees above all they need to remain safe.
Obviously in my sampling, I only see the scouting trips gone bad, but from my own scouting days, without some depth in your outer Scouts, boys who are have more strength, experience and judgement, you can end up needing to both babysit and conduct some sort of self-rescue. That's tough. With, say Scouts of 16, 16, 17, 17 and a JASM of 18 who have all camped and BPed together for 4-5, you can reasonsibly tackle more ambitious trips with some 13-14 year olds along. But a lot of troops don't have that "deep bench" and need, IMO, to take small steps to build that depth.
But I'll also note that I see the same patterns in some of the Scouting groups described in "Death in the Canyon". Again, obviously, these are worst outcomes of the worst-planned trips. And thousands of Scouts have had poor, good, and great trips in GCNP without any deaths. But again, I see where one mover and shaker can get a party of 10 WAY over their heads, in a way that if you had a group of 8-10 adult participants, someone would have said, "Woah, let's reconsider" before things got so dire.