"I consider jazz to be that singular, unique, original music of Parker, Gillespie, Davis, Monk, Coltrane, Mingus, Roach, we could go on and on, and further on into the ‘60s and ‘70s, Coleman, Taylor, Art Ensemble of Chicago, I could go on. I really get excited by the music of those last three, plus Don Cherry, Roland Kirk, again, I could go on. That’s my take".
And my take is that Jazz is first and foremost an improvisatory language whose character is not defined by whether the material being playing is original to the artist.
We can simply agree to disagree and leave it at that.