This is exciting. I have friends with both kinds of Diabetes whose lives havve improved with recent medication changes like that patch, but still not enough.
However, always be wary about how applicable animal research is to human disease. There are many many many things that are 'cured' in mice that don't work in humans.
This is simply untrue.
There are tons of epi studies showing that generally speaking, populations that consume large amounts of carbohydrates have lower rates of diabetes. Of course there are many other factors involved...
There are many factors involved in carbohydrate consumption: simple vs complex carbs (complex is best), time of meal and circadian rhythm (earlier in the day is better), the rest of the diet (the less processed the better, don't eat too many calories regardless of what type)
There are many factors that go into insulin resistance: muscle mass (higher is better), obesity (less overweight the better), gut microbiome, family history, soda, etc etc