Once again I appreciate your stream-of-consciousness meditation on the hand, which resonates more with mythic imagery than a literal reading.
This image is from the Cueva de las Manos, Perito Moreno, Argentina, dated from 9,000 to 13,000 years ago (created by multiple artists over time), one of countless examples found in prehistoric cave art.
And the very first cave art image we know of is a red hand stencil in the Maltravieso Cave, Cáceres, Spain, dated through a uranium-thorium chemical analysis to over 64,000 years ago – 20,000 years before Homo Sapiens Sapiens, our branch of the family, entered Europe – which means those faint images are the hand prints of Neanderthals!
Seems to go hand-in-hand (pun intended) with your post . . .