It&#x27;s all about the scale. Grossly speaking, on an average, Eiffel Tower is perhaps 99.999% air. But is this true at every scale? Does every cubic meter of the Eiffel Tower have 99.999% air? Or does every cubic micrometer? If we were to build a megastructure of size 1,000,000s X Eiffel-size with Eiffels as the building blocks being replicated, then perhaps the Boeing material is not super-useful. But most applications are 1,000,000s X the Boeing lattice sized.