A real geologist should give a real answer, but more or less it is due to how the molten elements and molecules sorted out back when the earth was younger and hotter. It has a lot to do with relative densities, melting points and propensity to mix with other materials. Everything heavier than helium and trace amounts of lithium are "star dust", the geology of earth is how that coalesces together and then combines and separates out in geological processes.

Pokemon Go to the ~~polls~~ beach

Dude, WTF are you talking about? When I was a machinist it was so much easier to deal with metric. 1 inch ~ 25 mm, from there it is just way easier to deal with measurements such as 27.5 mm instead of 1 5/64 inches and all of these inverse powers of 2. I was always jealous of the French machinist I worked with talking about how the only units you should ever have to work with is meters and millimeters. If you are concerned about "Human Scale" then intuitively a meter and a yard are close enough for estimates and you don't have to deal with "wait, what is 5/8 + 3/16 + 1 7/64?"

Not as confrontational, but had a similar experience with a collaborator. Due to the PIs' old habits, our collaboration meetings were telecons (telephone landlines, rather than zoom or other video conferencing). So at a conference, I see a poster from a member of the collaboration, having never seen the faces of many members, and go over to introduce myself. This other grad student was in poster presenter mode, so as I approach he immediately asks "So you are interested in [collaboration project], how much do you know about [project]" and I point to my name on the author's list and say "well, I am that guy".

"When we said 'fight to the last Ukrainian', we meant to the last!"

Don't listen to that Frank, it's a bunch of Optimate bullshit.