There is an argument to be made that if your engineers don't know what makes a good product, then they cannot build a good product. It's like asking someone wit

There is an argument to be made that if your engineers don't know what makes a good product, then they cannot build a good product. It's like asking someone with only a theoretical knowledge of music to build you a violin. With experience and careful guidance by a team of violin spec writers they can probably approximate a violin, but it will not be enjoyable to play unless it was made by someone who understands the needs of a violinist.