You need to understand what it has been like for people like 
@Outlier and me.   I had years of doctors and nurses telling me to lose weight, but the Eatwell Plate combined with calorie counting didn't work.  Adding a 2 mile walk every day didn't help either.   When I told the HCPs this they accused me of cheating, lying and forgetting I had snacks.  I knew the truth.  I was weighing food and calculating calories with the help of 3 calorie counting books.   No PCs back then, no smart phones, just scales, pen, paper and calculator.   A few years back my GP was training for a  marathon.   I regularly met him when I was about a mile from home on my 2 mile walk.  He stopped telling me to get more exercise after that.
When I told my nurse that I realised drinks with artificial sweeteners actually made me gain weight long term, the nurse said with a knowing look 'that's because you think you have done well to save calories and compensate by eating more'.
Wrong, I weighed and counted every calorie.
So I struggled on for years, eating less and less and moving more.  Eventually I got ill, catching every virus going and getting ever fatter, until that bout of flu in 2007 when I realised the madness of what I was doing.
I then ate as much as I wanted of good nutritious food, until I stumbled on the idea of low carbing.  Around a year or so after that I found this forum...and found I wasn't the only one for whom calorie counting didn't work.
So you see, I am well used to people saying I must have cheated or counted calories wrong, it's just irritating when fellow diabetics don't believe me.
But hey when the famine happens I will be the last one standing as my metabolism is so good at running on just a little fuel.