Lol. They weren't carving granite though, it was some very soft volcanic rock.
Yeah, I'd consider carving something out of stone to be the minimum, "building" one out of cast concrete or whatever seems a different project.
I wouldn't consider the Bass Pro Shops Pyramid to be the "same thing" as the Pyramids at Giza, for the same reasons.
I may be dating myself a bit here, but when I was growing up I used to go see Disney on Ice shows at the Memphis Pyramid rather than it being a Bass Pro Shop...