The film the Monty Python and the Holy Grail explains the difference between a claim based on divine right and one that rests on popular consent or sovereignty. The Lady of the Lake, her arm clad in the purest shimmering samite, held aloft Excalibur from the bosom of the water, signifying by divine providence that I, Arthur, was to carry Excalibur. That is why I'm your king.
Strange women lying in ponds distributing swords is no basis for a system of government.
Supreme executive power derives from a mandate from the masses, not from some farcical aquatic ceremony.