Monarchy's legit because the monarch has been chosen by God. In a godless society this means they have no good reason to rule. So good luck with restoring monarchy. It's a decoration in the West at best. At worst it's an unnecessary expense

I agree that what we have is not perfect and perhaps not even good but this doesn't make an easy case for the system you're advocating for

Which is a shame because if the king is good then country does well