> There is nothing about carbs themselves that is bad for diabetics.
That is untrue. A Type 1 diabetic requires insulin proportional to the amount of carbohydrates they eat. The larger the insulin dose, the higher the potential error in the dose compared to the carbs (it’s inexact). If the error is on the “too much” side it can drive blood sugar fatally low. This happens, unfortunately often.
Nowadays the artifical pancreas software can quite nicely counteract the carb spikes. It's not very hard, just take all your basals for the next two hours and then have no insulin delivery for that time. Especially if you eat fast carbs, this is the right strategy.
More complex is to dose for fat, protein and carb mixture. You basically need almost no insulin first, but in the next four hours you need 1.3-1.4x your basal to cope with the raising sugar.
That is untrue. A Type 1 diabetic requires insulin proportional to the amount of carbohydrates they eat. The larger the insulin dose, the higher the potential error in the dose compared to the carbs (it’s inexact). If the error is on the “too much” side it can drive blood sugar fatally low. This happens, unfortunately often.