But in my opinion, in today's society, if you take away the need for people to struggle (which UBI will do) they often end up in a worse mental and physical shape than if you make them suffer a bit. Just the way natural selection programmed us. "All basic needs are met <- conserve energy".
I can imagine a educational system where we prepare our children from childhood for UBI and it will work.
But given how rudimentary most education still is I don't see that happen anytime soon. Maybe in 100 years.