This methodology is so simple that it is brilliant. My favorite one was the file extension problem... of course ubuntu would solve everything. No file, no problem! I am surprised he didn't tell the receptionist to roll on the floor saying hail linux while he did a witchdoctor dance. Now only if my office had a receptionist so we can do this.

As to why computer jobs require competence, it is because any engineering position (computer, or otherwise) requires competence. Would you live in a building without knowing that it won't collapse tomorrow because the construction company didn't know how to calculate the required strength of the steel beams needed to support the structure?

A company won't go under because a secretary does not know how to make perfectly formatted word files from the get-go. Where as it will fail if a software company's key product is managed/coded by incompetence.