At the very least that suggests it was still built by HUMAN hands
Until you have the thing about the Jews being space lizards.
Anyhoo, IIRC, you had a small permanent work crew at the pyramids, but most people were seasonal, farm labourer types who didn't otherwise have a job when it wasn't planting or harvesting time.
If I squint my brain a bit, it looks like the Ancient Egyptians were building the pyramids as an economic stimulus package to provide employment, and build infrastructure that would bring in revenue long term. In that tourists still go to see them today, they were wildly successful.
Also, why is it always aliens building the pyramids, not doing something else there? For many, many years they were the tallest buildings on the planet, brought in visitors from all over. If you were an alien visiting Earth 3,000 years ago, what would you go see?
Actually, now that I think of it, given that several human cultures independently built pyramids, perhaps pyramids appeal to humans, or perhaps pyramids are a good way of building that sort of thing. If it's the latter, that might apply to aliens, who will then make bad TV shows about how Ancient Egyptians built theirs.