Diabetes just means that you can't eat sugar, right?

Wrong.
Diabetes refers to a group of diseases that influence how your body
produces and utilizes blood glucose (blood sugar). Think of glucose as
the body’s main source of fuel. Problem is that, just like a car, the
human body cannot run properly without oil, or insulin. Insulin
regulates the glucose in the blood to help ensure that there is not an
excess or shortage. Extreme fluctuations in glucose in the blood is very
dangerous and can lead to a slew of health problems.
For anyone
without diabetes who is reading this and thinking “none of this applies
to me, I don’t have diabetes..." chances are you have a relative,
neighbor, friend, or co-worker who is either already diabetic or at risk
of diabetes.