Just had a look at the video of this product. First time I have seen it.
Running woodwork classes for beginners in Japan, I can see that it may be a good product for trade schools or community workshops or clubs where the liability for owners to users is fairly large.
In an owner operator environment, I would imagine that most woodworkers would rather operate safely and know that if they are careless, it will cost them a finger.
Bit like a seat belt though. Better to teach drivers how to drive without crashing in the first place.
Steve