I always love quotes like this: "All jewellery had a magical meaning for ancient people. Bracelets and neck adornments were to protect people from evil spirits, for instance." And we know this how? Maybe it was just made to be pretty. A rich person giving their partner a gift etc. No one could possibly be able to make any further inferences from a species of human we know almost nothing about.
Also why many people cannot understand how the pyramids could be built without alien intervention