I'm at pretty high risk of developing diabetes since I have polycystic ovarian syndrome and I am overweight.
I try to stick to a low GI diet though to keep my blood sugar balanced, and try to stop my weight from getting too out of control. I don't want to end up with diabetes.
Chronic renal disease and kidney damage is only one of many different system failures you can expect once you get to that point, but it is one of the worst ones.
And if you are diabetic and overweight you might not be a good candidate for a kidney transplant. Remember that a donor kidney could be going to save someone else as well. Better to just try and take care of yourself in the first place and hope you never get to that point. I hope I never do.