I agree that people will still want/need meaning, and some may lose it, along with their jobs, but having the money for basic needs by default gives you the ability to explore your interests with less risk. You can spend 6 months learning to paint or program or write stories without worrying about food and bills if UBI is properly implemented. If you miss your tech support job, you can go idle in 30 channels on Libera and help people that wander in asking questions about whatever software.
What am I missing here? People giving up without trying to find something to do? People who feel useless if they aren't the family breadwinner? I personally look forward to a day when most people don't need to work, and instead can "work" on what they choose.