So it looks like what you argue is that without UBI some people are forced to work the shitty low paying jobs that more secure people would pass on, and that's beneficial to society? So basically wage slavery of the lower income people is beneficial to society?

I dunno... I think, UBI may actuall ydrive change in those very awful professions where they become more attractive either through quality of life improvements or through the pay rise. Otherwise, yep, I think having people not to go to a soul crushing job because they are secure is a better thing than grinding lots of them down generation over generation.