How transparent do people need to be about AI generated content/work?

Let’s say that you read a fantastic mystery thriller novel. It did all of the things a good book should do. Complex plot, well developed characters, suspense, evokes important emotions, etc. Hopefully we all know the feeling of reading a book that just hits intellectually and emotionally. You read the book, and the very last line says “This entire book was written by AI”. What would you feel? The effect of the book was the same as other books, but would that last line taint your feelings towards it? Should it taint your feelings towards it? Will the human touch of art and literature make it more valuable, as AI generated content becomes more popular? As I navigate my own thoughts about AI and the ethics behind its uses, I have found myself wondering when the line is crossed? Elementary example below… There is a super popular narrative that selling AI websites is a good business model. We all have seen the videos. Find businesses with outdated websites, build a demo, sell it to them for $500-$700, maybe charge a small monthly management fee for updates and SEO. Should the company buying the website be informed it was built using AI? Do they need to know that you have zero experience in web development? If they found out that it was build using AI platforms, do they have a right to feel misled? I would be curious to hear your thoughts below. Ask question or challenge my assumptions if you see them.