Worldbuilding

No. It was explicitly a counter to the idea of a constitutional monarchy. It grew out of enlightened absolutism as a political philosophy. Its champions include Frederick the Great, Catherine of Russia, and Denis Diderot (Of the slight misquote, although true in sentiment, "Men shall never be free until the last king is strangled with the entails of the last priest")

I know where the concept began. But there is a modern idea in fantasy literature that it is possible for kings and queens to be "good" and "moral" and could transform their countries singlehandedly to their "goodness" which is made up nonsense. All of those monarchs listed obviously thought they were good and moral, but very few people living in those times actually thought that way and we have ahistorically thrusted the love of monarchs onto the masses back then. Nowadays, it seems that the all fantasy literature is obsessed with this entirely mythical concept.