But the facts remain that they were not demonstrably smarter than us, and there was no technical expertise that they had that we do not to replicate the feat. Thus the statement that they were smarter than us, and they knew how to build the Great Pyramids and we do not is based upon nothing but ignorance.
The only sort of large imposing structure that COULD be built by their technology was, by necessity, a pyramid.
And while the craftsmanship and placement and such were all top notch, there is no great “mystery of the Pyramid” that would make replication of their feat impossible in modern times.