Maybe you and GP think about different concepts of "productivity". Economic value-add has only a loose correlation with work benefiting individuals and societies. That's the point of "bullshit jobs" concept - we're inventing occupations that feed on one another, wasting people's time and resources but making the numbers go up.

It's like in this story of soldiers who dig up latrines one day, and fill them up on another day. Yes, a lot of people were busy, but in the end, nothing useful got done and lots of man-hours were wasted.