The whole concept is more akin to whether or not you are working directly with the material fruits of your labor, or if you’re some secondary or tertiary job to the actual work being done.
Basically, their view is that if you are not directly making the product or apart of the physical logistics for that product, then you’re in a bullshit job. I would not say I agree with the philosophy myself, but i kind of get it. ‘I farm Corn’, ‘I Truck frozen food’, and ‘I catch fish’, do exist in a very different realm from ‘I manage a team of QA specialists’, ‘I am an Advertisement Consultant’, and ‘I contribute to my company’s server backend codebase’.
Also, yeah, the 3-word rule of thumb sucks.
Young Adult novels I think.