> But in fact, if people were moderately motivated, they could easily learn some of the other techniques that let them manufacture and/or duplicate objects.
That's actually a substantial barrier. People are lazy, and pressing 'print' on some design fed into a cornucopia machine (of which a 3D printer is a rudimentary fore-runner) substantially lowers that barrier. It requires no special knowledge beyond the feeding of raw materials into hoppers.
That's a lot less than what would be required to safely turn on a lathe, let alone making something with it.
That's actually a substantial barrier. People are lazy, and pressing 'print' on some design fed into a cornucopia machine (of which a 3D printer is a rudimentary fore-runner) substantially lowers that barrier. It requires no special knowledge beyond the feeding of raw materials into hoppers.
That's a lot less than what would be required to safely turn on a lathe, let alone making something with it.