Sounds promising for type 1 but not so much for type 2.
type 2 is not from a lack of insulin. Producing more without fully knowing how much more can be dangerous as heck, it seems to me.
It is. The natural regulating mechanism is also compromised, which is why we are all sticking our fingers several times a day to get a blood sample to measure. Which is painful, as well as expensive. Overdo the drugs or the insulin and you've got a risky situation, (you can faint, even die), which is why we all have some sort of sugar shot handy to pick us up if we get excessively low blood glucose. Being diabetic is a daily chore, no mistake.
More to your post - yes, this may be a cure for Type ones, but not Type Twos. As I understand it, Type Twos are secreting an unnecessary molecule that binds to the “key” that insulin uses to enter our cells. As far as I know nobody is sure where it comes from or how to stop it. All of the therapies I know about simply flood the bloodstream with enough insulin to overwhelm the blocking molecule. Open to new knowledge though, even at my advanced age.