Yes.
I think that a lot of the "impostor" sentiment among established jazz artists had more to do with technique than substance. After all, they had paid their dues, spending years woodshedding to master the difficult language of Bird and Diz. Now these "new thing" people think that they can just pick up an instrument and get up on the same stage.
The reaction was natural, and in some cases it was undoubtedly justified. But it could also be argued that, by the late 1950s, too much emphasis was being placed on mastery of accumulated jazz technique relative to substance. Somebody who isn't a virtuoso may still be able to pick up an instrument and express some interesting musical ideas. Conversely, a virtuoso who plays Bird solos note-for-note may have a lot of entertainment value, but is making a questionable contribution as an artist.
If we go by the opinions of established musicians of the time, everyone from Ornette Coleman to Albert Ayler to Cecil Taylor to Sun Ra was repeatedly called a "Charlatan." But that label has little to do with the value of their art.
Speaking of Sun Ra, by all reports, he ran an extremely interesting ship. On the one hand, he placed a lot of emphasis on hard work and discipline, continual rehearsals, little life outside of the band. On the other hand, he could pick up somebody off the street who is not yet a musican and feature him in the band in a few days. A lack of virtuosity was not the overriding concern.