It’s nonsense. Just try filling a bag with 5 or 10 tons
of cement...
Just how did they make 10 tons of cement any way?
Have any evidence of “bags” been found between the blocks?
Moving them and shaping them were hard enough but they
obviously knew how to do it.
Hesperia, California
https://www.kcet.org/shows/artbound/of-earth-and-domes-hesperias-cal-earth-sustainable-architecture
But no way as nice as the Peruvian construction.