I know people who have smoked al their lives and are still hacking along a at 90+. That doesn't make it a healthy thing to do.
Nobody is suggesting that loads of carbs = T2.
What I (and other agree I think) is that the trend is towards eating more and more carby / sugary / processed foods and the rates of obesity / being overweight / T2 are on the rise.
Children's excess weight it is perhaps the most alarming, an increasing proportion of whom may well go on to develop T2 in the future.
The other point, perhaps, and this is only my speculation here, is that the elderly (that's me, 63, and the generation above for example) did eat plenty of bread / breakfast cereals / carbs, but we mixed with healthier stuff too. Meat / fish / veg. There was far less processed food about in the 50s and 60s. Far less seed oils too, either to cook with or included within the manufacture of things.
I just feel that things are getting worse, particularly for the younger generations.
For the record, I used to be a baker! Hot bread, fresh meat pies, cakes. I REALLY wish somebody could tell me that they wouldn't affect my T2 these days!