Hello Melody,
The man also demonstrated how the rocks can be moved, not only lifted.
There is really no way for us to know how the ancient men were thinking, but there is really nothing mysterious or "moden" about putting two small stones under a large rock and then swinging the rock to one side and then to the other in order to to move it straight forward. The ancient men might have had a few such "tricks" under their hats that we still have not discovered.
That is true of course, but you would have thought the wheel was an obvious invention, yet it only appeared maybe 3000 years ago if that.
In the case of Stonhenge I agree it is a possibility, but the Great Pyrmaid is a very different matter, as, for that matter, are other ancient structures such as those built by the Mayans and other Mesoamerican advanced civilisations. The Maya did not even have metal, much less the wheel.
It is a fact that "modern society" with its modern engineering equipment, often has no appreciation of the immense achievments of the ancients, which makes todays architecture look positively primitive by comparison.
Kind regards,
Adrian