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.
You can’t expect to wield supreme executive power just ’cause some watery tart threw a sword at you!
I mean, if I went around saying I was an emperor just because some moistened bint had lobbed a scimitar at me, they’d put me away!
That whole scene is brilliant commentary on society.
Like so much of their stuff.