Basing this solely on the trailer, the King is not wrong. Not everyone’s wishes should be granted. As the ruler / government of the country, choosing the wishes that have the best impact on the well-being of the kingdom is kind of his job. Catching the person who is granting wishes randomly, or just all wishes is a reasonable course of action for the King. Of course, he’s probably a baby-eater or something equally villainous to make the audience hate him.