The starkest difference that I recognize between people in those jobs and people in my career is that in the former people have a hard time showing up to work on-time or at all and in the latter everyone is pretty tuned in and works hard.
It only hit me late in life that success in life really can be just as simple as showing up.
I guess what I would say here is that the kind of people who feel that they need collective bargaining agreements probably overlaps quite strongly with the group of people that have a hard time showing up.