Also keep in mind that the very first use of injected insulin was for T1 children who were literally at death's door because their pancreas had shut down completely and their bodies were unable to produce any insulin at all.

It was used experimentally as a last ditch effort to save the lives of those children. And it worked.

Also, let's not forget that children don't have much control over what food they are provided. Other than refusing food they don't like, they don't really have a choice, and if they're hungry enough they will eventually even eat food that they hate.

Of course the whole thing has gotten completely out of control now with "healthy carbs" being pushed on everyone, no matter what. Add in the constant increase in carb based snacks and vegan diets, and it's just a health disaster.

But still, the use of insulin really did start out with good intentions.