I kinda get you, but ultimately the design of the printed materials had to be created by someone. Creation is the key in all of this.
In this comparison, ideally that creator is the person printing the materials. There’s a disconnect if someone just downloaded the CAD files and printed it up then claimed 100% ownership of the creation credit.
I don’t see anything wrong with someone designing all the pieces in CAD, which is an artform in itself IMO, printing them and proudly wearing them. Its just a different tool. You use hand tools, they used digital tools.