I think it is a loss for professionals not to hang around with the amateurs - lots to learn in both directions!
This is true, and I like your attitude on that. Amateurs like me are in awe of professionals who make CD's, go on tours, get rave reviews, etc. But I never know what professionals think of amateurs who sacrifice much of their spare time to achieve some proficiency, and yet never come within
shooting distance of any professional pianist who does this for a living. It is a subject that interests me mightily.
As for Gurdjieff/de Hartmann, I listened to some more stuff from them on YouTube but can't help finding it deadly boring. Their treatment of the
material seems maddeningly basic and unimaginative, the pieces just stop in their tracks instead of having a satisfying ending. I'd just as soon
listen to this kind of music performed by original artists on native instruments. But that would be ultimately boring, too, western ears just are
not attuned enough, and western patience is unsufficient.
All the same I think it's is great that a well-known artist wants to make a case for this music. I wish more established pianists would dare to step
away from the iron repertoire.