Maybe you'll think differently about the example being moronic if you read the following. Maybe not.
Whomever built Puma Punku was able to create a socket system that required precision engineering to hold the stones together without any gaps whatsoever.
I think you need to read it again.
Maybe you'll think differently about the example being moronic if you read the following. Maybe not.
Whomever built Puma Punku was able to create a socket system that required precision engineering to hold the stones together without any gaps whatsoever.
https://en.wikipedia.org/wiki/Pumapunku#/media/File:Puma_Punku6.jpg
Whoever built ...
(Difference between subject and object of the sentence.)