"Geodesic spheres (structures of triangular components arranged to make a sphere) become stronger as they become bigger, due to how they distribute stress over

"Geodesic spheres (structures of triangular components arranged to make a sphere) become stronger as they become bigger, due to how they distribute stress over their surfaces." I happened upon some Bucky Fuller stuff recently, and wondered just how large geodesic spheres have been made... and it's not particularly large. Which makes me wonder: is this really the whole story? What is the flaw in geodesic spheres that keeps them from being the basis of huge enclosed structures?