@MoggyP
The divine right of kings hasn't existed in it's true form since the Magna Carter, which meant that there were limits on the sovereign
I think someone forgot to tell Henry VIII
In theory, the divine right was snuffed out with Charles I, and Charles II (who may have had a lot in common with Andrew) was required to accept that as part of his deal to wear the bling again.
In practice you trying being King or Queen and see how far you get.
And the "limits" you mention that are placed upon a Sovereign are mainly to reflect the fact that - much like malaria - are a parasite you can't get rid off, and that remains with you till you die.