I like music and poetry. While stealing from another composer/author/poet you "steal", using AI is not stealing. But to the point that dwnw is trying to make is that the product will not be from the heart.
If/when your audience will learn that you never actually experienced "this or that" e.g. I don't like Taylor Swift's music - at all - but it is rumored that she writes about her own life experience and that makes her output relatable.
Will it fill up 60mins for one album? Yes. Will you sell out the MSG when your audience finds out that it was all ChatGPT (or some other LLM)? No. Never.
Another metaphor/analogy is like the Friends episode "The One With Phoebe's Cookies" where the magic disappears because the 'grandma's cookies' end up being Nestle cookies. And the magic is gone, and your audience will be gone.