You can have blood sugar issues without being a diagnosed diabetic or even pre-diabetic. I'm not even diagnosed as pre-diabetic, yet if I eat a really high carb meal, my blood sugar can spike to 200 and stay elevated for hours. From what I've read, a normal person can eat anything they want and never go above 140, and probably not coincidentally, that's the level at which point many seem to believe cellular damage can start occurring.

This is just my opinion, but if you haven't done home monitoring or haven't taken the Oral Glucose Tolerance Test, then you don't know for a fact you don't have glucose issues and you don't know whether your blood sugar is spiking to high levels or not.

Since cutting back on refined carbs, processed food and sugar is generally considered to be a healthier way to eat anyway, I can't see not doing it.