> It's a monopoly on producing new copies. Compared to a situation where anyone could Xerox/scan your book and sell it (or give it away) themselves, it creates "above-normal" profit for you.
But if you labor on a musical composition for a 1000 hours and only get one performance at $100, your compensation is equivalent to 10 cents a hour, correct?
You need to compose something good enough to warrant many more performances. There's no guarantee of income, much less "above-normal" profit.
Best, Charles