You could maybe make that claim for the 2 1/2 ton limestone blocks, but what about the 25 - 80 ton granite blocks above the King's chamber that were transported from Aswan, 500 miles away? The Egyptians were also cutting and transporting 100 - 450 ton, 70 ft. long granite obelisks with regularity. The little limestone blocks may have been the least of the challenges they faced when building the pyramids.
The granite blocks were probably carved but they didn’t need 1,000,000+ of them...