You could create your own music by hand, but presumably someone wants to generate music because they want to target a specific skill like playing on the fly rather than playing something they just spent 15min writing.
Just like you might want to practice reading a foreign language with paragraphs you haven’t seen before, not the paragraphs you just wrote yourself. Certainly a useful skill to be able to write yourself, but not necessarily the skill you want to practice every time you want to practice reading.
Just like you might want to practice reading a foreign language with paragraphs you haven’t seen before, not the paragraphs you just wrote yourself. Certainly a useful skill to be able to write yourself, but not necessarily the skill you want to practice every time you want to practice reading.
I don’t see the problem.