I wonder if that is because some of the causes of type 2 diabetes (excess weight) also put people at risk rather than the diabetes itself.
Scientists have a saying: "
Correlation is not
Causation". For example, being an intrepid explorer of sunny climbs, I have noticed: "Every time I get sunburn, my Ice cream melts. Ergo
sunburn cause my ice-cream to melt"
Although it is intended to be humorous, my example illustrates what, in my view, is the biggest single problem facing modern society. That is: Good decision making is based on hard data science, and an unfortunate consequence of this is that this makes the decision process opaque to anyone who does not have an advanced degree in statistics.
Essentially, what I am saying is that you have to trust the 'recognised' experts like Doctors, DBUK, the NHS.... etc.
I know that this means taking most of what they tell you on faith, but to see the results of not doing so, you just need to look at the current economic and political mess we are in. It is an inevitable consequence of trying to apply simple, populist solutions to what are extremely complex problems.
Don't get me wrong. It is good to take an interest in your various maladies, this is why we are all members of this forum after all, But, don't become OCD about it. As an Asperger, believe me, I know that, at times, this can be difficult, but you have to develop mechanisms to help you recognise when your 'health anxieties' are getting the better of your good sense.