There's a big group that have no desire to ski like a racer and would be turned off by the idea of a lesson that marketed ski racers as the inspiration. Are mom and dad going to sign up their kids for lessons if all the messaging is about racers skiing fast? If you are a cautious person learning to ski, you are more likely to take a lesson to reduce risk. Meanwhile the people who want to ski like a racer may be less likely to even take a lesson, perhaps due to risk tolerance or the visual they have of the typical instructor.
I was one of these cautious skiers for many years - why do I want to ride the edge of my ski? I don't want to go fast like the downhillers. I want to be in control. It makes me go really fast when I ride the edge and I get in the back seat! I don't want to go fast, why are we doing railroad tracks? It took a long time for me to get comfortable with being on edge and also feel like that improved my control.
I feel like ski instruction for the masses is split in two and needs to be split. There's the group that aspires to be in control and get around the mountain safely. Most recreational skiers fall into this camp when they start and stay there if they don't ski many days per season. They are taught in a way that can lead to the intermediate plateau, statically balanced and not able to throw themselves down the hill. Then to get off that plateau, you need to get into the other camp - what Deb is talking about. In other words, you have to start over fundamentally and relearn to ski.
Or maybe this is just me... just the result of skiing many years for 2-3 days a season, then relearning quite a bit once I upped this to 10+ per season... I am not sure you can really teach each of those groups the same way?