There is no "purpose" to working, either. It's just you doing slave-wage work for a paycheck for most people.
Universal Basic Income means these folks shift gears from "ugh, my job" to "ugh, my life/arts/whatever." Same shit, different day.
I don't agree.
There is certainly a difference between a job and a career. It's said a select few get to have a career and most people have a job. That's rather depressing to think about, but its likely true. However, not every job is soulless. Even within the basic labor force, some employment offers a sense of purpose or reward. Your job can put you into the public sphere, make you interact with people, and give you something to safeguard. A family friend recently had to quit his work and go on disability because the arthritis in his hand had crystallized on the bone and he was unable to use that hand as a mechanic and laborer. And now he's incredibly bored, so he's offering to teach us how to repair our cars.
Work isn't evil, it's just not always fun. Mostly, it gives you a reason to wake up and approach the day. As much as I enjoy video games, they do not offer that to me. If my purpose it play games or binge Netflix, I don't have a reason to wake up. If I played games competitively or for the entertainment of others, then I would have a purpose. I'd be paid and appreciated for my skill. That is a sense of real self worth. A level up in a game is the illusion of accomplishment or worth, and eventually that illusion will break.
If you were pursuing the arts then that's different and irregardless of whether you can find work. If you're getting paid for your arts then that is a career of some level. It's a purpose. Many people have day jobs and create art. Sometimes they devote themselves full to the craft rather than the day job. I don't think we'll suddenly produce a ton of art just because men are jobless.