"Isn't God supposed to be the ultimate arbiter in all this?" No that all ended when James VII & II first fled the English throne because of the Williamite invasion and then was branded a traitor and booted of the Scottish throne by the Scottish Parliament. Since then the monarchs have accepted the idea, probably unwillingly at first, of the consitutional monarchy. Bonnie Prince Charlie and his father before him unsuccesfully tried to turn the clock back to rule by divine right.