I disagree, it's not that hard to moderate. Lemmy is not a legal system, if a mod mistake happens no one gets hurt. Appeals are easy, and you can specify in the rules that AI content must come with a disclaimer and description of why its OK if it wants to stay, otherwise it gets banned with everything else AI.

For the 0.1% "OK" AI songs mods just have to stop and read a sentence description, its not an overwhelming burden for something that maybe comes through once a month.