Well, there’s another side to this, of industrial ergonomics. The system assembled\built is supposed to be easily divisible with clear documents into simple non-ambiguous tasks which can be given to those blue-collar people. If the engineers designing it failed at that stage, you can’t blame blue-collar people for not being able to grasp something above their pay grade. They should be shown a few pages with “screw that with this, grease with such amount of that” and that should be enough.

Ergonomics seems to be having its own dark ages as an area these days. Both in consumer and in industrial stuff.