Assumptions

Mostly obvious:

1. Good art is very hard to do.
2. Great art is splendooferously hard to do.
3. An artistic failure or partial-failure isn't a crime, nor does it necessarily produce uninteresting results.
4. Good/great art requires, by definition, a good/great, engaged and knowledgeable audience.
5. Any music, e.g., that requires you be a scenester or "club member" in order to fully appreciate its brilliance and/or fiendishly clever intricacies isn't worth bothering with.
6. Following on from 5, any music, e.g., that relies too heavily on extra-musical concerns should be treated with suspicion.
7. allmusic has it bang-on correct re EJ, 1968-1976.