In the context of European politics, the monarchy was vastly preferable to the revolutionary forces which opposed it. I cite France and Russia as perfect examples.
You always need to be careful about throwing the bums out. Sometimes the replacements are even worse...often far worse.
Long before those revolutions the church closely aligned itself with royalty. Back in 800AD it was the church who handled the coronation of Charlemagne. That alignment continued until the French Revolution. And you’re right, it was vastly preferable.