bradfordlass I broadly agree with you on the question of diabetes. My DH's family have a history of pancreatic disease: cancer and diabetes, which have affected members of the family whether they were overweight or not. DH is overweight, did have Type 2 diabetes for a couple of years, but it has now disappeared. His blood sugars are consistently low, he does not need to regulate his diet and hasn't been on medication for several years. But DGS, who has been underweight for most of his 9 years, is currently being investigated for possible, Type 1 diabetes. We have a friend, always as thin as a rail who has had Type 2 diabetes since his 40s.
The problem with BSE was that rules and safeguards can only be based on known risks. Scrapie, a BSE type disease, was known in sheep but there was no evidence of it ever being passed on to other animals. BSE arose when processed animal protein fed to cattle, passed a scrapie like disease to cattle. Presumable a processed product could do what normal species to species transmission could not. This was not a risk that could have been foreseen when the rules were drawn up.
BSE comes under the heading unintended and unforeseeable consequences.