The Box holds secrets, The Church should not be your only guide.
Molière's audience was a worldly sector of the social elite in Paris. Indeed, Tartuffe was first performed for Louis XIV's court at Versailles.
Orgon abnegates his authority by assigning it to an imposter; the protests of his family, then, are justifiable, until Orgon returns to his senses. His behaviour is a model of bad kingship, and his household a model for "a kingdom in which the king surrenders his judgment to a bad counsellor" (Baker).
As Baker points out: "Despite the fact that divine right of kings is a theologically grounded theory of political legitimacy, the play implicitly insists that the monarch must never make his conscience the prisoner of his confessor or even the pope. Even the religious policy of the nation he must determine on the basis of sober and humane reason (which is faculty of the natural constitution of man) rather than on the basis of intensity of faith (which is to be suspected as an expression of irrational passion).