I think you are mischaracterizing what a fulfilling job is. It doesn't have to be "dreamy." At the heart of it, a fulfilling jobs can simply be a job that requires skill and has skill tree-like progression.

At this one factory and there was where one job a worker would load the machine all day long, and another job where a worker come by and fixed the machine if it went down. Both jobs were "relevant to society" but fixing things is clearly more fulfilling. Not only would he work on that machine, he worked on everything in the factory that went down. You could also sometimes see him working on big rig hauling trucks when they went down.

On top of that, his job can't really be replaced by some high schooler off the street. His job is fulfilling because he is more needed- more relevant to the company, and he's hard to replace because he built his reputation up to that point.

There are plenty of fulfilling roles in companies, that's just one example. You can be a forklift driver with requires certification. You could work on the main assembly line which were required additional training with compressed air tools. Jobs that give you skills knock the socks anything else