All I can say is that I am simultaneously grateful that I haven't run into the close mindedness that some (like BTS683) have and that I have a ton of freedom to explore my own understanding of skiing out loud with brilliant people who are open and generous with their time, their thinking, and what they are studying and endeavoring to understand. None of them have ever asked for my affiliation...
I have heard that there are those who are dogmatic, but gratefully I have not had the experience of interacting with them in the course of my explorations on-snow (although I have met a few here on EpicSki...
For me, I have experienced a lot of experimentation, discussions of a broad range of ideas from a wide spectrum of sources, and multiple approaches for growth and learning.
I find it interesting that EpicSki's own ESA events include as coaches current and past PSIA Demo Team members, at least one PMTS Trainer, Ski the Whole Mountain co-author Eric DesLauriers, The Encyclopedia of Skiing author (and EpicSki regular) Bob Barnes, members of other nation's demo teams (New Zealand, for one), and at least one former Olympic racer (not including Deb Armstrong, who will be at ESA Aspen). That's a pretty eclectic bunch, wouldn't you say? Not a lot of close-mindedness or egocentricity there, either, in my experience (and the experience related from the recent ESA in Stowe as another example).
There are a lot of close-minded people in the world, but in my experience, most who are closed are avoiding demonstrating their ignorance by blindly sticking with what they think that they know. That said, there are those who will have strong opinions about the efficacy of something in skiing and may grow weary of debating their point when it's either misinterpreted or misunderstood or deliberately misrepresented (all of which have happened here on EpicSki to multiple highly-skilled contributors). It can be difficult to distinguish between "close-minded" and "weary of explaining in the face of what seems to be intentional misinterpretation".
I know that my personal perspective has been misinterpreted (and, I think, intentionally misrepresented) multiple times here, and I try to be clear about my opinions of things. For instance, many see me as "PSIA" because I try to respond to misrepresentations or misinterpretations and clear up what I intentionally view as misunderstanding. Since I've read a lot of PSIA information in the past three years, I feel qualified to address some of those things. (For example, tipping is actually integrated with rotation in the Skiing Concepts: "Steering action of lower body is coordinated with tipping the legs to maintain balance and alignment throughout the turn.") But, I've also read a lot of other stuff (including all of Harb's books, the DesLauriers' book, Elling's book, LeMaster's books, and a number of others that don't get discussed here much) and watched even more on video. I'm an insatiable learner, and study everything I can. But skiing is life for me, not livelihood. And I gave up needing to be right 8 years ago.
I'm truly sorry that BTS and others like him have had such awful experiences with egotistical ski teachers. How sad for those close-minded ski teachers that they miss the joy in life over something so silly! My hope is that they will see the limitations they've imposed on themselves and others and will learn to play. After all, isn't that what skiing is supposed to be? Fun?!