There are hundreds of AMC volunteer led trips every year in the Whites, thousands up and down the East Coast. Don't extrapolate one or two bad experiences to the entire program. With any program of that size you will get a few misguided or misinformed leaders and not hear about the 100's of successful, informed, and sociable leaders.
Thank you for that.
AMC, Meetup, ADK, 3500 Club, etc., yes they all have good and bad leaders. But from what I can tell, the good outweigh the bad.
As a 3500 Club hike leader, I am always looking for teachable moments. We interview hikers to make sure they have the gear and experience for the intended trip. Sometimes we turn them away, with pointers as to what they lack.
We always have a little talk at the beginning of each hike, discussing staying together as a group, and other topics. We get out a map and describe the intended route. If it's off trail, when we get to where the bushwhack begins, we again get out the map and compass, and show them what we do to determine a bearing.
I also discuss Leave No Trace practices as the hike goes on. Camping above 3500 feet is illegal in the Catskills, and I frequently have to tell people why. We pack trash out if we discover it.
And we do shun Cotton! When it gets wet, it tends to stay wet.
We also teach Winter preparedness classes.
I could go on, but I hope this answers the question posed above: "Do they merely ensure safe passage for the guests or are they actually teaching stuff too?"