Unfortunately the prevailing ideology dictates that if you're not working you are worthless and you should not feel happy.
Also slacking (I am half a slacker on the way to ~zero) is toxic on the long run.
I always thought of universal income as way to allow me to grow without a burden. Learning, helping, producing (whether art, tools, ...).
It's supposed to help strengthen the social tissue.
but I think we agree, the goal is to reduce faux-slavery due to the need for basics necessities