has no clue about.
In many cases, Type 2 diabetics have the same issues as those with Type 1.
I'm Type 1. This means that my immune system has destroyed my pancreas when talking about its ability to produce beta cells. Beta cells create and release insulin from the pancreas. Insulin acts as a "key" which is used to "unlock" each cell in your body, to allow glucose to enter the cell, where it belongs, and where it is used for energy.
If no insulin, or not enough insulin is available, glucose cannot get into your cells where it is useful. Instead, it remains in your bloodstream, turning your blood into sticky syrup. "Syrup-like blood" is bad. It can't flow as it should, it can't get into your capillaries as it should. It damages your nerves. it damages your organs, your eyesight. Everywhere your blood flows is affected.
The same is true with Type 2 diabetes, except that Type 2 diabetes is on a spectrum. Some people with Type 2 produce "almost" enough insulin that is required, but not quite enough. These people can sometimes control the effects of this by exercise and eating fewer carbs (carbs raise blood glucose). Some people with Type 2 produce substantially less insulin that is required. These people may use diet and oral medications to control their blood glucose. Finally, some people with Type 2 produce next to no insulin. These are the people that require insulin through injections or a pump.
Fit people of normal weight can get either type 1 or Type 2 diabetes. Type 1 diabetes is typically referred referred to as "juvenile diabetes", but it can and does sometimes manifest later in life.
Food is only one driver when discussing diabetes. Other factors are: heredity and genetics. Your liver also plays a role in diabetes. There is something called the "awakening syndrome" where your liver will dump glucose in your blood upon awakening...to "wake you up" and prepare you for your day. This will happen whether you eat or don't eat anything.
So many facets...Diabetic ketoacidosis. Even if your blood glucose is not super high, you could get this life threatening condition which is caused by not having enough insulin in your body.
All of these factors are why it is OUTRAGEOUS AND INSULTING when non-medical or otherwise uneducated people make comments about diabetics "eating too much".