Alternately, it is insanely more complex to manage the parts for and assembly of a machine with thousands of parts, hundreds of variants, with parts coming from all over the world, compared with a $5 boxed item where everything, including the box, as all made and assembled likely within a much smaller geographical area (sometimes it's all within the same building). And shipping it is also WAY easier, in that, if a box of them falls off the truck, or is crushed by a conveyor system, or just disappears, it's "oh well, who cares, it's just cheap ****, maybe keep anything easy to pick up and isn't damaged at all, throw everything else away", vs shippin a 2-4 ton metal lump that can't be touched anywhere except the 4 rubber wheels, for not crazy money. Your comparison is, frankly, completely stupid.