What if I say most of the Egyptian alien theories are actually because of racism? The idea that these "ancient primitive African people" couldn't build a giant stack of rocks, or carve an ear well by themselves, but the "ancient advanced Greeks" could make the Parthenon alone
IT'S BC THEY HAVE MAGIC IT'S BC THEY HAVE MAGICCCCC
Mondstadt is home to the Hexenzirkel, one of the best alchemists in Teyvat, and a witch librarian. They don't NEED advanced technology bc magic and alchemy fill that niche.