This isn't actually the problem since we need and will continue to need UBI for non-AI related reasons
>People say it will free us up to pursue whatever we want, but to me it sounds like the worst cage imaginable.
This is where you missed the bit that "pursue whatever we want" will also be limited by AI, and secondary effect of people growing up consuming and enjoying AI productions that tailored to their interest. At best, you'll have a few people commanding Patreons who have some skill, but generally you'd have to find a domain to pursue that isn't already automated. Luddite subcultures will have to develop. But generally you yourself and most others, particularly children of millennials who'll grow up with this stuff progressing in sophistication, might just spend your time watching your video prompts come alive; and who would wanna. do anything else when you can get straight to what you wanna see.