While I agree that assistive devices are necessary, and this could be used as one, I highly doubt that it was invented for that purpose.
Maybe
I suspect that it is for children to use so they don’t have to use a knife. Then again, I don’t know the last time I ever saw a child prepare their own food.
Just because most children can’t use a knife safely doesn’t mean that anyone who can’t use a knife safely must therefore be a child.
That’s called “association fallacy“.