As a counterpoint. Truck drivers don't need to know how to build a truck nor to crane operators need technical understanding of the materials in the crane's structure.
Truck drivers, not so much. Although, when your truck breaks down in the middle of nowhere during a blizzard and you have a load where you get paid based on timely delivery, I'd bet having some knowledge on the truck's internals would be helpful.
Understanding everything beforehand is not what I was attempting to communicate, but simply researching and understanding why a stack overflow comment is the answer, before just copy-pasting it into the terminal. Like reading the man pages of the commands to be run before running them.