One of the leading cause of mortality is diabetes. It can trigger or worsen any existing diseases. When a person is not mindfull on their diet especially the kind of food rich in carbohydrates and lack of exercise can lead to diebetes. Please limit your sugar intake and do moderate exercise. If you are living a sedentary lifestyle like sitting all day long in offices/computer work, have time to walk around.
I think you have a point as to how to prevent diabetes but I think your points will help in managing diabetes in the sense that, diabetes happens as a result of damage to the beta cells of the islet of Langerhans within the pancrease which are responsible for the production of insulin to transport the converted starch into the cells for energy. In the case of such diabetes, even eating moderate amount of carbohydrate won't solve the problem since there is no insulin to transport the carbohydrate. Again, another type of diabetes is when the beta cells are intact and producing normal insulin but then insulin cannot recognize its binding receptor on in the various cells to form attachment in other to be able to transport glucose. In such an instance, eating carbohydrate in moderation will serve as helping manage the condition and not prevent it. Per what I know about diabetes, I think watching your lifestyle is key to helping prevent diabetes. Lifestyle factors such as smoking, drinking heavily, consuming saturated fats, and etc should be avoided. Exercising regularly will help to boost our health. With Type 1 diabetes which is caused through hereditary, diet cannot prevent it. Live a HEALTHY LIFESTYLE.