The idea that it’s a mystery how the ancients built large projects like this and Easter island is simply modern chauvinism.
Many people simply don't have any grasp of how complex technology is and how quickly and easily it is lost when unneeded and possibly but rarely redeveloped when needed again.
Or the chamber that was “theorized” by crackpots, included into Assassins Creed based on said “crackpots”, and then revealed to actually exist by sonography?
I think it’s far more sycophantic to insist that the ancient Egyptians were “primitive” rather than “advanced” when it was built, but hey, I’m against the grain and thus a crackpot.
You’re saying there’s evidence of structures miles below which pyramids? How were these structures detected? Who discovered them, using what methods?