You should read Dunn - he’s a respected machinist who took engineering tools to measure as much as he could inside the Great Pyramid and found that something happened - traces of two chemical compounds were found in two of the shafts which went mixed in conjunction with - something to do with the subterranean chamber - I forgot all of the specifics at the moment - generates current.
All of that is as scientific as it gets with measurement and chemical analysis, so its not a matter of belief, but perhaps an interpretation of the data.
There is absolutely no evidence that the Great Pyramid was looted - that’s conjecture by modern Egyptologists, who are tied up with consensus thinking and protecting the myth begun by Herodotus, maintaining Egypt’s largest source of revenue - tourism.
“There is absolutely no evidence that the Great Pyramid was looted”
I suppose if you ignore the evidence that someone pried open the “sarcophagus” in the King’s chamber, breaking off a whole corner of it. And of course the lid, which would have weighed tons, is missing. Oh, and also that tunnel that was found dug behind the niche in the Queen’s chamber that was not dug by any modern explorers, and goes back what, more than 100 feet?
We may not know if there was ever any “loot” to be looted from the Great Pyramid. But there is certainly evidence that people entered it to look for some.