No, they don’t want to “change it until they can play it”; you simply don’t understand what it means to be a creative musician and what drives them. Do you really think that jazz musicians pushing the envelope make more money than those who play what audiences already recognize and like? Really? The opposite is true. Where do you get your data? Moreover, if you are suggesting that they “changed” it so that they could play it you would also be very mistaken. You obviously have no idea how much harder it is to play many modern jazz compositions compared to a typical and familiar blues-based composition with its comfy and predictable harmonic progressions and Chin-Chin-ka-Chin rhythms. We can disagree about stylistic differences, but that is a separate matter. Each successive era in jazz history has posed new musical challenges compared to the previous era. What is baffling is how with so much proof before you of how jazz has evolved (changed to use your word) over the years that you think that it would all of a sudden stop changing. Why would it? Does ragtime sound like Dixieland? Does swing sound like bebop? Does bebop sound like hard bop? And on and on. Oh, I get it...it is suppoised to stop changing (evolving) when it starts to move beyond what you like or understand otherwise it becomes “noise”. Got it.
**** I think it was perfectly reasonable that the music of Bird and Dizzy would sound like Chinese music to Pop’s ears, Especially when you consider the music that Louis Played, and the music that proceeded Bebop. ****
++++ I think it is perfectly reasonable that the music of new Jazz musicians would sound like noise to Rok’s ears. Especially when you consider the music that Rok likes and understands and the music that preceded modern jazz. ++++