Another advantage of democracy is a source of popular legitimacy for the government, which helps prevent coups. Dictatorships struggle with this, and have to apply other countermeasures to prevent coups.
Unless a dictator is some kind of super-popular national hero or has managed to convince everyone that they have a divine right to rule, they depend on the support of a group of elites to maintain their power, and have no choice but to prevent other ambitious people from concentrating power themselves. This means that even in cases where the dictator happens to be wise, skillful, and benevolent, their regime will suffer from corruption and fragility, because they have to keep doing favors for their support group to keep them loyal or else risk a coup.
Being a dictator is a position that tends to invite well-grounded paranoia and suspicion, because you know that ambitious and bloodthirsty people want your job. So you need to keep files on people.
They can't defer too much independent authority to talented bureaucrats or military generals or private business leaders, at least not without some guarantees on their loyalty, or else they run the risk of those people attempting to seize power. They can mitigate this by developing a cult of personality, but that makes it impossible to gracefully admit mistakes, and in conflict with maintaining a free press.
Unless a dictator is some kind of super-popular national hero or has managed to convince everyone that they have a divine right to rule, they depend on the support of a group of elites to maintain their power, and have no choice but to prevent other ambitious people from concentrating power themselves. This means that even in cases where the dictator happens to be wise, skillful, and benevolent, their regime will suffer from corruption and fragility, because they have to keep doing favors for their support group to keep them loyal or else risk a coup.
Being a dictator is a position that tends to invite well-grounded paranoia and suspicion, because you know that ambitious and bloodthirsty people want your job. So you need to keep files on people.
They can't defer too much independent authority to talented bureaucrats or military generals or private business leaders, at least not without some guarantees on their loyalty, or else they run the risk of those people attempting to seize power. They can mitigate this by developing a cult of personality, but that makes it impossible to gracefully admit mistakes, and in conflict with maintaining a free press.