It's not a waste at all, and some of the knives are of his own design not Star Trek's. He enjoys making them.I've never heard of him.
Edit:
So after perusing his website, the ST Props Departments hires a talented custom Knife maker to make knife designs that look like showy "Mall Ninja Knives".
-_-. What a waste of this mans talent, to have him make knives that look like that.
The shadow blade for example has shown up in other places, and pre-dates Nemesis.