That's just replacing the tyranny of the retard majority with the age-old tyranny of the priests who know whats best for the people, and damn anyone who disagrees.

At least when the retards try to run things on their own authority, it's inherently fallible and open to challenge. Add in a divine mandate, and you pave a path of very low resistance to a stagnant culture that exists entirely to perpetuate itself "as god wills it".

Unless you somehow got people to worship an abstract concept like "knowledge" or "discovery" and actively prohibit a priest class, this solution is worse then the problem.