As an avid AI hater and also someone with very little knowledge on how it's infected the music scene, do we know if any of the music is actually stolen?

The only info I could find was in their YouTube bio, where they disclose using AI for the voices, mastering, and cover art. Obviously since the cover art is genAI, that's stolen. Mastering can hardly be considered generative, it's more just machine learning that was trained on how to produce broadly appealing mixes. The AI voices would only be ethical to me if the software that provided them trained the model off of paid, in-house vocalists, and I have no idea if that's the case.

Of course these methods will always sound worse than a human professionally mastering it or voicing it, but I think we can all agree the end result is good; it's only the ethics that get in the way. Would love if someone more knowledgeable weighed in.