Replacing bullshit jobs with UBI takes away many ways that important emotional needs are met. Feeling useful, important, part of something bigger, respected, etc. These are very important for quality of life.
I would argue that it's worse to slowly come to the sickening realization that you're not actually useful. That the people around you just put up with you and give you something to occupy your time with out of pity.
If we make sure everyone's basic economic needs are met, then maybe they'll surprise you and find a job or social niche where they legitimately are useful and valued. But if you're economically imprisoned to your current job, then you won't have the time or freedom to explore.
Also, unemployment insurance and welfare as they are now are fundamentally different from UBI. The nature of these programs is "stay unemployed or economically useless, or else you lose the benefit" and it actively disincentivizes people from trying to contribute to society.
I take it you've not spent much time talking with people in bullshit jobs? Most would be thrilled to be paid to watch/teach their kids, or work on an artistic side-hustle or hobby. Work is just the stupid, pointless bullshit someone makes them do to have money, while taking time from them they could be using for things that are actually valuable. It's not meeting an emotional need or making them feel important. God, certainly not respected.
>Feeling useful, important, part of something bigger, respected, etc. These are very important for quality of life.
And it's pathologically toxic that we as a society believe the only valid way to meet those emotional needs is by providing value to a company in exchange for the means to survive.