That’s not true, look at how much things deteriorate after just 100 years.

Anything made of metal 5000+ years ago would be dust by now. The only thing that lasts that long is stone.

No amount of slaves with chisels will make marks like this in granite. It requires a circular saw. I’m not claiming crystal powered space ships here. I’m claiming that whoever built the pyramids were more advanced than the AJ cent Egyptians were.