I thought that was the standard, accepted, quasi-official explanation. It's the only one I ever heard seriously discussed. His lefty critics don't exactly take him for a fool. He has the incompetence of hubris - but so do many of dangerous capability. That comes with the territory. (It also comes with Lewy Body Dementia https://www.alz.org/dementia/dementia-with-lewy-bodies-symptoms.asp) His standard Republican (fascist) approach of destroying the influence of reason for the benefit of power and money - which he undertakes to assure will be his power, his wealth, his dynasty - is deeply foolish of course. Even if he succeeds, he gains a diminished thing - diminished by his gaining it. That's why those of his ilk wear the medals, actually sit and watch the parades, demand the flattery, focus on abusing their enemies. But that does not make him a fool in the sense of being incapable, having no genuine power, chasing windmills of mist. If you have ever walked into the living room of a mob boss, you can see manifested the utter folly of undertaking organized crime to gain wealth. But that doesn't mean the wealth was not gained, or that he can be easily deprived of it.