I think we are looking at this differently.
First even if book publishers are outsourcing it is to a bigger printer, not some guy with a photocopier in his basement...
I agree that it's not to a guy in his basement. But it's only to a bigger printer because the publisher is no longer a printer at all. (and any printing is more than none)
and those who are outsourcing, likely they are outsourcing Stephen King novels, not Kilgore Trout.
I disagree. Since the publishers don't do their own printing, they have no choice but to send all of it out.
If I read you right, you are saying that O'day is going to outsource boat building to a guy with a 3-D printer --- is that right?
Not to a guy with a printer in his basement.
But potentially to a specialized company whose sole purpose might be to print large form factor items (which in this case would include, but not be limited to, boat hulls). I would expect said company to have multiple printers, servicing multiple clients, probably in multiple industries. An industrial 3D print shop, if you will.