I don't even think that actually touches on the point here. People want purpose, meaningful purpose out of the thing they spend most of their lives on. Unionizing isn't going to give you job satisfaction if you're a data entry operator unless that's something you find fulfilling.
I work in IT and used to be passionate about computers and the internet but now I want to do something else and get away from the grind of IT work, where nothing is ever completed or provides a sense of accomplishment. There's no meaningful purpose in it for my life other than a paycheck.
Unionizing might help with getting better pay for work but in terms of actual purpose, fulfillment and job satisfaction unions are as useful as advocating for a car club when I'm changing my oil. Completely unnecessary and unrelated and doesn't address the goal at hand.
This is something that's an individual pursuit beyond days off and pay.