they do not provide proof. why should you? he could as well argue my bookshelf didn’t exist, since none of you have seen it yourself. but is this a discussion worth having?

also: the underlying idea, that modern tech could do better whatever a human has done without it, is just naïve. we do not build much rounded shapes in windows and stuff anymore bc our machines work best and most efficient for straight cuts if we want to make use of their power we have to build a certain way.