(equivalent of people being glued to their smartphones today)
(Related) This is one explanation for the Fermi paradox: Alien species may isolate themselves in virtual worlds
The people we saw on screen most of the time also held important positions on the ship (especially the bridge, or engineering) and you can't expect them to just waste significant chunks of time.
Also, don't forget that these people actually like their jobs. They got there because they sincerely wanted to, out of personal interest and drive, and not because of societal pressures like in our present world. They already figured out universal basic income and are living in an advanced self-sufficient society, so they don't even need a job to earn money or live a decent life - these people are doing their jobs because of their pure, raw passion for that field.
Similarly in Stat Wars with droids: Obi-Wan is right, droids can't think and deserve no real moral consideration because they're just advanced language models in bodies (C3PO insisting on proper protocol because he's a protocol droid is the engineering attempt to keep the LLM on track).