Owning a fancy car, buying expensive wines, or dining in nice restaurants is a random sample of human activities that I understand. I could have as easily selected tapping maple trees for syrup or blacksmithing like you said.
The picture of the gun you included is indeed a work of art, and, as you say, it belongs in a museum or with a collector. I am sure a collector would welcome if such a gun came with a pedigree specifying the year and place of manufacture, a list of owners, and the name of the person capable of such intricate workmanship. Again as you said, such a gun is never to be shot. If you are a collector, I understand and respect you.
Yes, the precision of modern weapons is amazing, as is that of many other things: watches, space rockets, laparoscopic surgery. If you enjoy shooting, you can go to a shooting range.
Maybe my blog wasn’t clear. I wasn’t talking about the gun in your picture, but about the ones the Florida shooter purchased last month — weapons made by machines in huge numbers, and sold for tremendous profits at gun shows and on secondary markets without any limitation (control). Why would normal people buy those things, unless they wanted to kill?