Not at all. Especially if you need multiple copies of it, making a "master" and tracing it would probably be a good idea.
Since a digital version of the design is a CAD file on a computer I guess I don't see a need for printing the digital design using 3D printer, then scanning it, tracing it into another CAD file then printing the scanned versions as more copies. If a backup is needed, multiple copies of the original "master" 3D CAD file can easily be made (as a computer file) much quicker and cheaper than printing it then tracking it manually into a 2nd generation copy.
I also have no idea why Chris spent time scanning and tracing the printout in the first place (since he has the "master" design). Maybe to show that someone can do this to produce knockoffs of his design? Chris, how long did it take you to print and then scan and trace this into a viable 3D CAD file?