OK so I can definitely see why it would seem pointless or really narrow, but I think this would have actually been very helpful for me and people like me. I have dyspraxia, a coordination disability. Mine is specifically graphomotor, meaning the exact types of movements involved in writing. My handwriting was absolutely terrible, causing pain in my hands (I also had incomplete hand dominance, so yay, both hands sucked equally), inability to express in a written form, and difficulty with tasks like painting, drawing, sewing, and cooking. Over the years the most helpful things were gaining strength and switching to printing only, no running writing at all.

If this tool could help with increasing the feedback from my hands to my brain and also push my fingers through the shapes of letters I think I would have had some benefit. I think people who have had a stroke may also potentially benefit, though obviously it would need thorough testing.