Disclosure: I did not read the whole thing. I, too, felt the premise was faulty and not worth reading beyond.

First paragraph: "Once adulthood is reached, life follows an austere pattern, with a 5am start, cold baths, daily visits to the gym, little or no alcohol, a Huel-rich diet, and Stakhanovite working hours. This last point generates particular excitement, and descriptions of powerful people dwell with eager fascination on how many hours they devote to their labors."

Why are we taking the CEOs words at face value? They are notoriously known for doing and saying whatever will most help them succeed. Do they say they do these things? Sure. Do we know if they do? If they look like they workout, they probably do, but otherwise how do we know what they do with their day? Anyone who probably actually does know probably has to sign some crazy NDA. Will lying about their routine help them succeed? Quite possibly. CEOs rarely work their way up in the same company over decades, starting on the factory floor. They are MBAs that hop from one company to the next. So they are incentivized to promote some kind of mystique about themselves to make them seem more deserving over the next hopper. Knowing the lack of ethics associated with CEOs, it is not a stretch to assume there is a lot of fluffery in their self-proclaimed routine.