Perhaps because they have been told military dictatorship is bad, much like racist is bad and bigotry is bad, but fail to understand why any of those things are bad, merely the label is bad. So if they can skip all the hard thinking and assume people of a different skin color or religion are bad that is fine as long as no one harmfully applies the racist label to them it is all good.
They can support a strong leader as long as no one tells them they are voting for a military dictatorship because a dictatorship is what the bad people in movies have so they don’t want that…
(Or I’m over generalizing and they do in fact know why other people say dictatorships are bad but just assume because it is “their guy” calling the shots no leopard will eat their face)