The way I understand it is nobody wants to have a stigmatized label whacked on them for life so if controlling your blood sugars through diet allows someone to have normal readings, then they can be free of the label, so long as it is of benefit to them to be so.
For others, keeping the label might make more sense if it means access to subsidised strips or future tests (why be out of pocket if you don’t have to.) It also makes sense to keep the label if your love affair with carbs has not ended so you can remind yourself that carbs could hurt you if you overindulge.
For me, even without a diagnosis of diabetes, I think it's wise to understand the metabolic dysfunction that is insulin resistance and see the spectrum of diabetes (at least T2) for what it is. We don't really reside in an isolated box that is diabetes or not (except that budgets probably force goverments to make cut offs hence the blood sugar levels and targets - which differ depending which country you live in). We are all on the ladder and some of us have just climbed a little higher than others and got burned a little harder in the process. We can all try to climb back down provided we understand how we got there in the first place. Some of us will always carry the scars. Others will never show any evidence of having been there, although if you look into insulin resistance and the health problems associated with that, you may find more links to your other health problems than you realised. They may or may not be as serious as diabetic complications but they can still compromise our quality of life in different ways.
Any clue that our blood glucose levels are even slightly elevated I would take as a gift and a chance to make things better rather than worrying about whether you have been stigmatised or not.