Do you actually know why T2 is caused? Do you know why only certain people get metabolic conditions?
The main cause or the root of most endocrine conditions is inflammation, this will have a significant impact on how your hormonal response changes because the next stage is insulin resistance, insulin response and a tendency to higher than normal blood sugar levels. Because this can be a long process even getting to prediabetes and the .main assumption that obesity causes T2 diabetes.
You only mention beta cells, what about alpha cells and how your circulating insulin is stored. This wasted insulin can cause hyperinsulinaemia, which will effect your health. This insulin is the cause of unwanted fat. That will effect the liver and become fatty, along with liver function, also kidney, pancreas function. Too much circulating insulin is definitely not good for you.
If you maintain a diet that is high in carbs and starch, and to some extents, the wrong fats, as in low or no fat, low sugar, no sugar, reduced sugar, there is still sugar in it!
Because of our nutritional needs as I explained in one of my posts, the diet that we have grown up with and are advised as healthy, to someone who has a metabolic syndrome and a tendency not to process glucose derived, because the insulin response is going to be too low, then it is usual that so many people get diabetes or a metabolic condition. To those like you and me, this is not healthy. Healthy for someone else is not healthy for me.
Along with the glucose tolerance tests, I had a range of other tests that included some that looked into a variety of how my hormones responded, to see if other than my low insulin response, my other hormones were checked, my thyroid along with adrenal and so on were fine.
In my experience with my condition and knowledge of how I ended up with my rare condition, finding answers is dependent on who you are reading. And as I've said before, what works for me won't work for you.
The bottom line is what causes your diabetes and how you treat the higher than normal blood sugar levels, it has to be sustainable, it has to prevent further complications, it has to get you healthier, it has to make you realise that knowing your body is so important. You do have to look into keeping your mind and opinions open. It is you, you're trying to understand.
Some of the strange things I have experienced and the foods that I cannot eat can be surprising, who would of thought that a staple healthy food like potatoes are my nemesis. It's the starch, it's the quickness of how it spikes me, it's the highest glucose levels that makes me have the symptoms of hyperglycaemia, then the rapid drop towards normal, because of a secondary insulin response called an overshoot, which drives me into Hypoglycaemia.
The only way I can control my blood sugar, is to avoid all those foods that causes a spike.