You don’t know what you’re talking about. Losing weight and eating healthy can definitely get rid of type 2 diabetes.
There is diabetes and there is insulin-dependence. And there are .... well ....
Hyperinsulinemia causes people to have Type 2 diabetes. Type 2 diabetics can do things to reduce their daily dependence on insulin. They can usually get back to just relying on their own pancreas.
Type 1 diabetics have to get insulin another way. Every day. For the rest of their life/lives on earth.