It’s a common elemental theme we see across stories, fantasies, etc. It seems like it is an element that should be part of that pantheon but maybe there is a scientific explanation of why it isn’t? Or is it simply, they did not have enough understanding of it at the time those 4 were suggested.
The Greeks knew of electricity, knew of static shocks and lightning, but since the only thimgs they could apprise of it was that it zapped you and made noises, they must have assumed that it was something secret.
Zeus’s lightning bolts must have been hammered together of billions of those tiny zaps you get from sheepskin and amber. The blacksmith that can weld lightning must be a deity, all in all it is too great a subject for mere mortals.
And then Ben Franklin came along and slew Zeus and stole his lightning.
I now I use Zues’ power to read your words from great distances. Take that, puny god.