Do you think maybe that it only happened to some for a Good reason. All Types 2’s react differently to Diabetes and it’s treatments as do Type 1’s.
Most Type 1’s are okay using intensive therapy to bring down their sugars(I did it myself because I had to and I was Fine) while a minority injure their eye vessels, or make injured ones worsen, etc.
So isn’t it possible this only happens to a minority of Type 2’s with the intensive therapy?(Granted, even one is too many). The problem then would be how to discover who would be injured or die from IT beforehand which is quite impossible at this time, I think. Unless the Drs./Researchers have noticed other similarities in the minority Type 2’s bloodwork, etc. I believe the answers are all in the blood/DNA.