Neither can I explain how the Inca workmen cut and shaped the stones of Sacsayhuaman fort, but they were still working on it when the Spanish attacked in 1536.
The Inca had nothing to do with the Abrahamic religions, so, however they were built, it was nothing at all to do with Moses or the Bible and so there is no reason whatsoever why the Egyptian pyramids should be, either.
It seems to me that we have this tendency to come up with wild hypotheses relating OT symbolism to Egyptian temples, with the added Mystery of how the pyramids were built to make it all more impressive -sounding. But it really is all self -delusion without a shred of valid support.
Now, the other suggestion about how the pyramids were made is the Alien Technology Hypothesis. There are some serious objections to this, but can all be explained away with the usual excuses ("they were smart enough to remove every scrap of evidence", and of course "Who knows what the explanation is, but there probably is one, even if we don't know what".).
But the Inca stonework, while some of the most inexplicable and puzzling (I can't blame Eusebius for scoffing at the Llama sinew and sand explanation - it seems unbelievable to me, but cut hard stone they did and Llama sinew and sand was all they had
) is also the evidence that the workmen of the time did it with the tools they had and it was neither God nor alien engineers that did it.
I noticed that the stones of Macchu Picchu are graded in quality of workmanship. Some is relatively crude and other stonework is meticulously crafted. The amount of time spent on shaping and finishing the stonework was surely related to the Status of the person who would occupy the building. This is not using lazers or power saws, but lengthy and careful shaping with stone hammers. The marks of these hammers can be seen in examination of the stones still seen in Cuzco, where the work was done for the Inca capital and was of the highest quality.
Inexplicable as the work seems to be, it was done by humans without power tools or magic and so there is no reason whatsoever to suggest that pyramids were not made by humans without divine or alien help.