I don’t know much about the subject of insulin toxicity, but I do know how sometimes two things are correlated and they shouldn’t be.
If the idea is that people who use more insulin are more likely to have more problems, I do not know if that makes sense. It might be that people who use more insulin may generally have worse control. I do not know. It may not be the insulin that is causing the problem, but the control. That is a problem with some of those reports.
It might be like saying - people who are using their windshield wipers are more likely to have a car accident. Obviously, turning them off in the rain is not going to help. There is a totally different reason for it.
I would be interested on reading up on this idea.