A lot of people seem to be uncomfortable with the possibility of history and technology going much further back than the conventional POV.
For some, this goes right into forbidden knowledge.
If indeed human history and technology does go back much further than conventionally accepted, that might imply that humanity might have made the climb from the stone age to the space age more than once.
Today, there are various people that would like civilization to be smashed back down into a dark age. Some would even like to test out their most powerful weapons to wipe out most of the population. IE, a WW3 scenario.
Whether there was an ancient world war or some big time natural disaster, almost everyone could have been destroyed. An ancient advanced civilization and its technology would be the stuff of legends or mythology today.
Movies like Deep_Impact , Meteor and Armageddon depict a natural impact into the Earth scenario.
https://en.wikipedia.org/wiki/1566_Icarus#Project_Icarus
https://www.worldatlas.com/ancient-world/11-ancient-mysteries-researchers-still-can-t-explain.html
https://www.popularmechanics.com/technology/infrastructure/a35867403/ancient-architecture/
https://www.pastfactory.com/culture/worlds-weirdest-architectural-mysteries/
https://www.loveproperty.com/gallerylist/92627/28-incredible-architectural-mysteries-explained
