Nature has a tendency towards efficiency. Not only do we see efficiency play a role in physics and chemistry. It shows up in biology and human behavior as well. This was noted by Darwin in his work on evolution, and by Mises in his work on economy.
The fact that something is possible, does not mean that it is likely to happen. It has to be efficient as well, especially if it is to become a widespread phenomenon.
The long necks of dinosaurs came about because it was efficient to develop long necks. It allowed dinosaurs to reach high up in trees for leaves to eat. To say that the long neck of dinosaurs became common for any other reason is pure nonsense, because there is no other efficient use of a long neck.
Giant flying dinosaurs were not only able to fly. They were able to fly with ease. Or else, what point would there be in flying? If it was difficult for them to fly, they would have adopted along the line of the present day ostrich. They would have become land dwellers. The fact that this did not happen tells us that the environment the dinosaurs lived in allowed for giraffe-sized animals to fly with ease.
Similarly, we can conclude from ancient ruins that the ancients had little trouble in cutting and fitting together huge stones. The widespread use of polygonal stone work in ancient times indicate that this was once easy to do. The frequent use of enormous rocks indicate that this too was relatively easy.
Megalith at Baalbek, presumably cut and transported with ease
By Ralph Ellis – Ralph Ellis images, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=7931251
If it was any other way, we would not have seen the widespread adoption of these techniques. They would have been rare examples of fancy stonework, not the preferred techniques for most constructions.
It appears then that things were quite a lot different back in the days when the sky was golden. Working under the red sun of ancient times, people made stone structures that we no longer can replicate, and they did not do this solely to impress people. They did this because it was economic to do so.