But hey, aliens did it. They couldn't just land on Earth. Their ships were designed to land on a Pyramid because that's how intelligent race would build their spaceships. Don't question it, just trust the specialists (who wrote books!).
Anyway, for anyone interested in Ancient Egypt, the best thing out there (I think) are Bob Briers lectures also available on Audible.
Not really, OP's image is somewhat misleading. The truth is that we're constantly trying to improve our understanding of physics and some theories are not completely correct but they often provide a way for future scientists to dig deeper and figure it out. Then with new knowledge, new hypothesis can be suggested creating a gateway to deeper understanding of some concepts further down the timeline.