I was shocked when I got to that part. Even aside from the specific jobs he mentioned, he seems to truly believe no one in the united states does physical labor that requires physical strength. Even being charitable one would have to at best assume he meant 'almost' no one which is still is profoundly disconnected from reality.

The experiment as a whole seems somewhat uninformed, there are many liquid diets intended for long term use which have been developed scientifically and the results of which have been studied for decades. I guess this is good for his own personal discovery, but I think his goal is also around making money... in which case if I were in the market for a liquid diet I would rather something that was designed by nutritionists, taken by thousands of patients,and scientifically reviewed... rather than a learn as you go tested on one individual