I totally agree!
what Bill & Chris do is functional art and using one of these to make a prototype does nothing for the process other than letting them make a mock-up quicker and easier to check ergos, appearance, etc...
Additive Manufacturing/3d printing is the sort of thing you would do if you want a base blade shape to start with. Say you want to make 25 EDCs that all fit the same pattern kydex sheath. You hire a waterjet or laser cutter, or run your own CMC machine to make a bunch of duplicate blanks - then hand grind, HT, make handles, etc...
3d printers are tech toys trying to become production machines over the past 5 years.
they work best in plastic, but there are versions that use sintered metals that you then bake to "melt" the parts together, or vapor deposition, where the printer is spraying layers of metal to build up a shape.
The driving theory behind the 3d printers is less wasted raw material.
They're the flip side of CNC machines -- where you download a program with all the specs and the machine removes everything that doesn't look like your finished product.
my original reply was mostly to CL telling him why I don't think 3D printing would work for what the guys are doing here.