How old are you?
This is a very idealistic point of view. I might call it a "I watch a lot of Star Trek" utopian kind of view.
Vast majority of people in the real world do a "useless job". What do you think they should be doing and how do they get those alternative opportunities to feed themselves and their families?
Not to be glib, but I think you're too locked into an ideology.
Idealistically we shouldn't be working in jobs that do not add value to society, that could well include my job.
You work 8 hours to live 4.
You work 5 days to enjoy 2.
You work 8 hrs to eat lunch in 30 mins.
You work all year to take a week or two holiday.
You work all your life to retire in old age.
You might claim that people need to work to live, but honestly, if you're not adding value to society then expending resources and wasting your life is.. just wasteful? It's not just stupid it's literally harmful.
We're not post-scarcity, and I'm certainly not saying that there's no value in people's jobs -- I'm not even saying where to draw the line, but I think there is a line to be drawn. Driving a 4x4 to work as a greeter in a large shopping mall is just a confoundingly stupid notion and saying that a person should not be able to live without doing something as stupid as that is... well, quite divorced from the reality of the universe outside.
Not to say that there isn't a sociological requirement for people to feel useful, but that feeling could easily be found in more humane sections of life like being a good parent or good neighbour.
Vast majority of people in the real world do a "useless job". What do you think they should be doing and how do they get those alternative opportunities to feed themselves and their families?