Didn’t read the article so bear with me
Saw a great show on 3D printing pressurizable lunar habitats for moon exploration. I believe they heated to the melting point the lunar regolith that they used as a building material. They practiced on earth with a similar material. We live in amazing times......if we don’t blow ourselves off the face of the earth.
I think construction and manufacturing, as well as organ replacement, is where 3D printing will be most significant in the short term.