This has turned into another exercise in "DIFFERENCE IN KIND VS. DIFFERENCE IN DEGREE"

Differences in KIND occur across a large range of proficiency... (starting with the guy in the woods with a stick and a log. He can't read sheet music, but he has started a new KIND of behavior that will eventually lead to people who can.) ranging to the person like Michelangelo who excels at many kinds of artistic expression.

Differences in DEGREE reveal proficiency within a subset of the KIND. Subsets of ART are painter, collagist, sculptor, and many many more... including music.

People in one subset of the arts are almost always very specific in their focus, and therefore not proficient at all in the other subsets. It would be incorrect to say that a sculptor is not an artist because he lacks the skills of the painter. It would be equally false to say that an art student is not an artist because he/she cannot yet paint like Michelangelo. The terms "artist" (and "musician" ) do not imply excellence , only activity within a KIND of pursuit.

To say that an artist is not an artist because they don't perform at the proficiency of someone else in a different subset is false logic, for it then becomes an exercise in comparing apples and oranges.

If you bring notation into the picture as a "requirement", then you must consider the different KINDS of notation.. including MIDI. If MIDI were the notation kind, then many DJs COULD use that kind of notation to reproduce other peoples' works of art. But we should still remember that the original guy in the woods with a stick hadn't progressed to reading notation yet... yet he would be considered a primitive musician by the KIND of activity, if not by the DEGREE of his proficiency.

The arts have traditionally been defined very loosely and inclusively, because its the nature of creativity to venture into new territory.