Who is Anne?
Worth remembering that the older we get the lower our personal fat threshold (the thing that makes us get fatty livers and sometimes develop T2) often becomes. Muscle mass and fitness levels often diminish with time, while fat deposits shift in distribution. Often, with middle age, we get apple shaped and our once muscular limbs get less muscly and more... um... stringy.
Subcutaneous fat (the thing that makes you look slim, or not slim) is irrelevant to the personal fat threshold, so it is perfectly possible that you may need to slim down to a BMI of 19 or below, in order to get below your liver's personal fat threshold. Or that you may never get below it. We have had a number of people post on here with MUCH lower BMIs than you who have not achieved it.
Plus of course there are a significant number of T2s who do NOT have diabetes because they have exceeded their personal fat thresholds. There are many other reasons why T2 develops.
I guess we all have to factor these things in.