Religion

There is a fundamental assumption that "the people" don't want a dictatorship in any form (monarchy, despot, theocracy, etc.) . There is a reason the people that wrote the constitution put little faith in the "voters" and tried to structure it such that only certain people would ultimately have power. Even the roots of the democratic party trace back to people who would not have liked that title. It is why for decades many autocratic rulers explained to the west that if they embraced democracy in their regions, those most likely to get elected would be folks like the Muslim Brotherhood, Al Queada, and Isis.