In a true post-scarcity society where Musk et al are off colonizing Mars while you're stuck on Earth on UBI, doing what exactly? In such a future, AI has automated boring chores but also everything else. Art, movies, cooking, everything you might find enjoyable. So lots of free time to do what? Work on yourself? Nobody will care. Engage with your hobbies? Nobody will care to see them, so unless you're the kind of person who enjoys their inner life without interaction with others, be aware nobody will read your AI novel nor watch your AI movie, because they can make one specifically tailored for themselves.

To me this seems like a hellish future, a mix of "Farenheit 451" with people staring at wall screens (only AI-tailored for them) or the "basic income but restless" people from Earth in "The Expanse". It's even worse than "A Brave New World" because human workers will be mostly unneeded. Their basic necessities covered, but nothing for them to do, no real struggle other than boredom. Any challenges that remain must be artificially self-imposed, because the real challenges will be for a chosen few.