Type 2 diabetes (adult onset), which is what you are referring to will almost never occur in weightlifters.
Type 2 diabetes occurs almost exclusivley is people that do not exercise (resistance training).
When people don't lift weights, their muscles become resistant to the effects of their own insulin.
Their bodies still produce plenty of insulin, but the insulin is is unable to transport the glucose into the muscle cells.
It is a fallacy that the type-2 diabetic doesn't produce insulin...they do.
A bodybuilder may only use 15 IU's after they train.
A type 2 diabetic may do between 40-80 IU's every day of injectable insulin.
So the scale is much less.
The bottom line is that BB's do suffer from heart attacks & high cholesterol.
They also suffer from narrowing of the arteries.
A much smaller percentage suffer from high blood pressure, because the dilating effects of exercise
keep the blood pressure down.
But BB's practically NEVER suffer from type-2 diabetes because their muscles are very SENSITIVE to insulin, as opposed to being RESISTANT to insulin. When a person's (BB's) muscles are SENSITIVE to insulin, from all the weightlifting, the insulin (whether produced naturally in the pancreas, or injected) works very efficiently, and there are no problems.
It is "urban legend" that Bodybuilders become diabetic. It almost NEVER happens.
Their muscles are far TOO SENSITIVE to insulin for that to happen.
People falsely think that by using insulin, you will "Shut Down" your pancreas.
That IS NOT how people become diabetic.
People become Type-2 diabetic due to their muscles becoming RESISTANT to insulin.
It's that simple.
I have never met a type 2 diabetic that lifts weights.
Conversely, every type-2 diabetic I have ever met, and I have met
literally thousands, does not lift weights.
DISGUSTED is 100% correct by asking "Why would it?"