Nothing is "fabricated completely by machine" like an ink jet prints on paper. I work in 3D printing, the closest to this fire-and-forget model, and there are s

Nothing is "fabricated completely by machine" like an ink jet prints on paper. I work in 3D printing, the closest to this fire-and-forget model, and there are still a lot of design contraints and optimizations that any engineer needs to know to be truly good at making parts. If you're designing shaping, molding, machining, etc. parts having an idea of manufacturing processes is essential to elegant solutions at low cost. The other way would be like an artist who instructed someone to paint his masterpiece from his initial sketch. A lot is lost in translation.