I hope this is true as it would be amazing in the extreme and would indicate advanced engineering techniques 4000 years ago, that exceeded ours today and could change all history of the far past.
However, I doubt it. Could this have been done with primitive hand labor? Perhaps it could, but it would have taken much time. What concerns me is the rather shallow ground water beneath the pyramids which is only 15 to 20 meters, 48 to 65 feet. To dig vertical shafts through the aquifers would have taken advanced engineering of which we do have today. It would have taken pumps to remove the water. It would have required a method of sealing the aquifer. Where in the hell is all the excavation material from the shafts, tunnels and chambers. If it truly exists today it will be water filled shafts and chambers unless they sealed the aquifers with material that has lasted 4000 years. If such our engineers today would really like to know what they used.
Oddly the depths they say the shafts are would be the top of the Nubian Sandstone also an aquifer which would be the max depth even with modern engineering due to water invasion. It is one thing to seal off shallow water as exists at Giza. It is an engineering nightmare to seal off deep water under geologic pressure of overburden. Could it be done with modern engineering, maybe but at an expense beyond belief. To do this would require pressurized caissons to keep the dig from being flooded. It would require decompression chambers for the workers. We actually do this today.
As mentioned, I hope it is true as it would have been the greatest engineering marvel in man’s history. I doubt it is true but again hope it is.
Genesis 6:4 📖
4 “There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.”
But what were these vertical shafts for? So much work for what?