Some related points of (hopeful) clarity rather than answers, since I did dabble with this already in school:
1. I'd distinguish between AI and other kinds of algorithmic (I include aleatoric) music, which has been around for centuries in various forms. Generating an ostinato, whether you are doing it by hand or by computer--you know the effect, how to achieve it, and you follow the process. It's no coincidence that ostinato-driven minimalism in the 1960s folds over with process music. You're already following predetermined algorithms whether you draw it out by hand or tell the computer to generate it.
It's also a common misconception to say algorithms write the music. When I work with algorithmic music, I am creating an environment or situation, composing with codes/rulesets, computer or not. I still have an idea of what I'm getting because I created the conditions for the output. I might change the process and experiment with the outcome, and learn what the relationship between my changes and the output is.
AI definitely changes this quite a lot.. even though I can train AI, and work with it, and maybe over time, once I intuit how the AI works, get a better idea of what to expect when I train it and learn it's particular quirks, so to speak