As I recall from history class, there were many who wanted to crown George Washington as king. From the Declaration of Independence:
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.--That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed
Nothing about it requires democracy. People can consent to a king, and if the king protects their God-given rights, that's a much more efficient solution than the messiness of democracy.
That being said, democracy is a better risk-adjusted solution because people can't really guarantee that a monarch will remain aligned with the goal of protecting their rights. Or in bitcoin terms, think proof-of-work vs proof-of-stake. Proof of stake is much more efficient, but we prefer to take the less efficient solution as the price of immutability, decentralization, security, etc.