Don: Been there. done that. All I know is what I can do. I've been with high level Classically trained players and while I know the techniques and the strict training are admirable, and the music produced is so beautiful, I felt a bit of sadness at the lack of improvisation which just does not play that well in a Classical setting. You are trained to interpret written music. And I have experienced hours of training just showing me how I'm supposed to attack the string at a particular angle, and the constant repetition to get perfect tone, etc., with just one finger..etc., etc. I had the opportunity to play with a very high level Classical/Flamenco player(better leave the name out here) at a function where I suggested that we improvise a particular portion of the piece, just for experimentation and fun and got looked at with that "RCA Dog" look. Nope, he ain't gonna be listening to MY ideas...Your word "adamant" comes to mind here. Andres Segovia was known for his strict adherence to form and with that he produced music that will live forever. But to talk to him about "open tunings?" Would be like trying to talk the Pope out of his stand on birth control. He has to toe the "party line" so to speak. My Dad used to ask me when I would close the refrigerator door, " how do you know if the light inside the fridge went off?" LOL. I guess with some things you have to have that   
element of trust.
Oh, I've got to tell you this story. I worked for Polygram records during the era of Saturday Night Fever, Village People, Eric Clapton, etc. and worked with Vas Polakis, Head of Classical A&R. So one time Neville Marriner(St. Martin in the Fields) was in town to give a concert Place des Arts and I was given the task, delighted of course, to act as the A&R Rep for the company, attend the show, and make sure Mr. Marriner and his entourage were looked after. So they did the whole thing with the black tails and bowties and all and the break comes up so I go backstage to find them in a near empty dressing room around a small table. I look and they have two water glasses on which there are two forks stuck together and they are playing a game where they are whacking the forks with their fingers, sending them high in the air, trying to land the things in each other's glass. Well, I nearly fell on the floor. "Is that what you guys DO during the breaks?" "I thought you would be discussing the next score or quietly relaxing on a couch..." They tell me , "No, we already know the score..." "We just need to relax" HA HA HA HA...
So, Don, don't assume that you know how much others know and have experienced...
p.s. Is the lightbulb OFF over there?
And RELAX, my friend, there are people on the earth who have no problem with multiple tunings and staying in tune. you just haven't met them...
bob