I come at this discussion a little different way, but in parallel to Gary's comment.
I see fine art, architecture, metalwork, textiles, firearms etc. as part of a collective inheritance. These things are a legacy that we honor by preserving and studying. Doing so is a mark of respect for countless unrecognized men and women who made our modern lives possible.
Thousand upon thousand of square feet of museum space is devoted to preserving objects from our past. Yet, if preserving and studying the products of the past is valuable, what about the processes that made those products?
In my view, those processes, those work habits and approaches are also part of the heritage. The only effective way I know to study those is to attempt to reproduce them. The only way to preserve them is by doing them.
Now, forging a rifle barrel is not for everyone, but I'm gratified that someone knows how to do it. To thoroughly lose those skills would be a loss to our patrimony as much as the destruction of a piece of fine art, or a fine longrifle.
I doubt that the engineer in Gary's story would appreciate any of this. There is more than one kind of blindness. Some forms can be addressed by education. My hat is off to those such as Gary who have devoted a career to that education.