Interesting though!
I would gladly attribute it to stupidity if I logically could.
However - it takes quite some skills to get at the top of the food chain - I wouldn't classify physical attributes - like being a dumb athlete, good at running marathons while wearing corporate outfits - as a requirement - to fill- up those leadership roles.
Actuality quite the opposite - I would guess that someone - to get to that positions - has to demonstrate a tremendous tenacity and cunning capabilities - so they can convince they are better, stronger and more capable to take decisions - while not holding a basic degree (or even experience) in the area they are designated to lead.
Mostly exception - where you would see a minister of transport - having any experience on how to change a Tyre, a minister of health - being in good health - with at least 3 doctorates in medicine, psychology and philosophy....
Those exception are so little - that it is fair to say that it is pure con skills that get those people in position of power.