I had been following this thread with interest. My background in in the visual arts, I taught painting, drawing and printmaking and currently work at a major museum. IMO art can take many forms of expression but having skills does not always translate into art.
I believe anyone can learn to draw or paint if applied to it; but even a good drawing or a good painting does not always make a work of art. I suppose is the same with many human endeavors, we can transcend whatever is that we make, musical instruments(Stradivarius) cooking (a new recipe) and yes, knife making and sharpening into art. However,someone with great skills to copy a Picasso or a Rembrandt remains a skillful copyist and not an artist.
By the way, there is school of art & design in Boston that includes knife making in its course offerings.