I would agree with your statement here except for the word regardless. I recognize that people with diabetes can attain good to excellent A1c’s with a range of daily carbohydrate consumption.
I’m even aware more recently of people who maintain very good A1c’s consuming a low fat, high carbohydrate plant based diet. I’ve read accounts of people consuming 200-400 mg of carbohydrates per day with decent A1c’s. I think their game is more complicated than the one I play. I believe that they must pay strict attention to calculating their carb ingestion, carefully calculate an appropriate large insulin dose and timing, I also believe that these people usually adopt a very aggressive daily exercise regimen. I suspect that their average blood glucose is higher than mine with significantly more variability and hypoglycemia.
I’ve been reading more and more about hyperinsulinemia provoking inflammation and significantly contributing to atherosclerosis or coronary artery disease. I currently take about 30 units per day but in the past I’ve gone through periods of taking 80 units per day. In the case of insulin, I do think that less is more. I agree with the sentiment expressed by @IWannaBeABetaCellHea; larger and larger doses of insulin may come at a long-term health cost.
Medical textbooks estimate that the average gluco-normal person’s pancreas secretes about 0.5 units of insulin per kilogram of body weight. I think this evolutionary preference needs to be weighed when considering how much daily insulin is healthy in the long-term.
I don’t think that most people reporting in this thread would be able to eat unlimited carbohydrates per day and yet achieve respectable A1c’s. Again, we differ from each other but I believe we are spread across a spectrum.
For each of us, I think, there is a level of daily carbohydrate consumption where our control falls apart. For me, it is about 125 grams/day. Once I hit that level for a few days then my insulin doses just don’t seem to work dependably. My insulin to carb ratio, pump basal profile, and insulin sensitivity factor all cry for much more insulin. My blood glucose average and variability goes up. So does my time hypo.
So, yes the daily carb intake with still respectable A1c’s for members here run a spectrum but I still think, based on my limited personal experience, it is not without limit!