Speaking as someone who has changed his own oil more than once: if I needed to know how to do that in order to operate my car, that would indeed be bullshittery. I benefited in no way whatsoever from changing my own oil. It was, as it turned out, simply a very- low- ROI- recreational activity.

The point here isn't that the command line is bullshit. Knowing how an engine lubrication system works isn't bullshit... for a mechanic. But it is a waste of time for a cab driver.