I mean, the rule discussed in the OP is pretty specific, regarding websites like Udio, which are quite dubious (ethically) in how they were trained. OP is not banning all uses of AI in music and points it out clearly. This is not about being technology myopic and saying "AI is the devil" or something silly like that. This isn't about "you can't use tools in music" or anything similar either. For example, I begin all my mastering from Ozone's "smart master" function, which uses AI.
I don't see the point in this honestly. Sure, a big percentage of stuff we use in music is, to some degree, a black box (like, I have no idea how an EQ actually does what it does), but the difference in how much control I have between those plugins and (today's) genAI tools is night and day. Although I don't know exactly how my VSTs generate the notes that they generate, I tell them what note to play and I usually have control over a decent amount of the sound properties. With genAI you don't have control beyond a prompt and stuff like modifying an output is basically impossible (with today's tools at least).
As for more complex prompts like what you're saying... I dunno, it seems like a technology so completely different to what the OP is discussing that I don't think bringing up it as an hypothetical makes much sense really.