Such methods and techniques are pure conjecture. No one has ever demonstrated or recorded such methods being utilized for the task we're discussing. Not even by the ancient Egyptians themselves, who painstakingly recorded every aspect of their history, culture, and daily lives.
You'd think that an accomplishment as grand as the building of the great pyramids would rate at least a passing mention somewhere, but no. Not a word or a single image about pyramid building was left anywhere.
We're talking multi-ton stone blocks here - many of them being solid granite - that can't be fashioned in the condition we find them, without the aid of massive earth moving equipment and very modern cutting and grinding tools.
Given the evidence we can see with our own eyes, simple logic doesn't allow us to indulge in conjecture about ancient people with primitive tools building these structures.
I know we’re making guesses, but at least trying to make educated ones.
Why no records of the methods? Well here’s another educated guess. It was considered a sacred art, not to be divulged to commoners or foreigners.
It’s at least as good as anything else out there. Hush-hush explains a lot.
And I still think it is a matter of scaling up the methods. Probably, the magicians of Egypt (whether or not they knew any actual magic, and maybe they did) were in charge of this pyramid building process. They’d probably kill for the fame and fortune of getting the Pharaoh to dedicate monstrous amounts of labor at their direction.
I guess ultimately... imagine that YOU were one of Pharoah’s magicians. And you wanted an absolutely impressive to-do that NOBODY else could duplicate.
I think we know the mentality, and it would look like the secrecy of the atom bomb program. We don’t go bragging about how we make these bombs by publishing a spec that anyone can copy. We set off the bombs.