"Perhaps some people would be more interested in instruction if the instructor accepted them for the short-on-talent people they are. Rather than teach them to "be better", teach them how to enjoy the sport as the people they really are."
Interesting observations, Oboe. A few things come to mind in response...
As Dexter Rutecki said in "Aspen Extreme," "We're not curing cancer here. We're teaching people to slide down a hill on sticks." Here in the Rocky Mountain division of PSIA (and, I hope, elsewhere), there has been a tremendous emphasis placed on individualized instruction: i.e., tailoring the lesson to the needs of the individual, starting with asking specifically what that individual wants to achieve in that lesson, what worked before, or didn't work before if that person had lessons previously, finding out about the person's physical condition, fears, motivations, etc. No-one passes certification exams if all he/she has to offer is a "canned", rote lesson. Teaching a client the things that enable him/her to ski better, will, automatically make that person enjoy the sport because skiing won't be work anymore!
Skiing is not rocket science. It is enabling gravity and your equipment to get you down the mountain. GOOD skiing is minimizing the things you do that get in the way of the most efficient and effortless manner of doing that! Most skiers (I would say 99%: I only had one client this year refuse to allow her body to stop fighting gravity and insisted, from almost pathological fear, on continuing to use her skis as brakes) when exposed to the concepts and intents that result in good skiing, will embrace them, AND CAN DO THEM, and IMMEDIATELY feel more comfortable.
The key is having an instructor who understands these concepts, can introduce them to the client in a way that lets the client buy into them, then has the skill and empathy to briefly explain, demonstrate, then have the client perform the exercises that will allow the client to feel how they open the door to better, more comfortable skiing. If the instructor does his/her job properly, the client will come away from the lesson with a few key "anchors" that can be keyed into before each run and facilitate a better result, one can be built upon, from then on.