This is the very definition of unnaturally: the creators of those AI songs spent a ton of money promoting them, for whatever reason.

If that were true, then I agree that, "it's extremely unlikely anyone will ever encounter them naturally unless the creators spent a ton of money promoting them" would be true. But if you're on MusicTok or using any other popular music discovery channels today, you are encountering at least some AI-created music naturally even if you don't realize it.