Yes, high blood Sugar is bad, but it's excess fat mixed with a carb-based diet that's the root cause of hyperglycemia as we've been trying to tell you for a while now:
The reason low-carb may work to prevent hyperglycemia is you're simply taking carbs out of the equation per se.
Now aren't you glad to know that carbs aren't evil and you don't have to avoid them and you don't have to live off disgusting raw meat anymore like you're some kind of carnivore?!