There is the old quote attributed to Duke Ellington, I believe: "There are two kinds of music.....good, and bad". I've also seen it ending as "good, and the other kind". But that doesn't really help, as different people put the same music in the two opposite groups. One man's good is another man's bad.
Jazz musicians dismissed The Beatles in '63 (or so said Jeff Hamilton, Diana Krall's drummer, at a drummer seminar I attended about ten years ago) because they weren't virtuoso musicians, apparently not knowing that being a virtuoso musician is not what is required to make good music of the type The Beatles were making, any more than being able to compose like Bach (or write a song as good as did John, Paul, & George) is a skill required to make good Jazz music.
Jazz musicians dismissed The Beatles in '63 (or so said Jeff Hamilton, Diana Krall's drummer, at a drummer seminar I attended about ten years ago) because they weren't virtuoso musicians, apparently not knowing that being a virtuoso musician is not what is required to make good music of the type The Beatles were making, any more than being able to compose like Bach (or write a song as good as did John, Paul, & George) is a skill required to make good Jazz music.