Exactly. Hans, it is just a tool. A compass, ruler, and exacto is fine for a thin piece of styrene but if you need anything that is thick you may as well as schedule yourself for surgery before you start cutting.
Also, just becasue you can create the hunk of plastic... that means nothing.
Hans, you tell me, when was the last time you constructed a kit and put it on a table to be judged without painting, detailing, decal-ing, etc etc etc the kit? Ill answer it NEVER, I know you would never do such a stupid thing. Just because we can replicate parts and kit pieces does not mean someone doesn't have to design them, or for that matter, build it afterward.
two final points, for those of us that like the old and rare kits, thing of this. You have a very old, rare kit that is made of vinyl, lets say. You dont want to damage it because of how old it is (and how hard vinyl is to work work) The kit has been out of print since the 70s, so you scan it into this thing, and print it out in ABS plastic. You get the joy of working with that old sculpt without damaging the original at a fraction of the cost of the resin (over time if you use the maker bot often)
Second, you have someone who is an amateur sculptor or who wants to start their own model making business. They cant afford a massive slide molding machine in their garage so they can buy one of these and use it to start producing their kits to sell at their local IPMS, word gets out, money comes in, suddenly we have a new manufacturer on our hands.