@ab
You're right.
About two thirds of over 60s are overweight and between a quarter and a third of 60-70 year olds are obese, so the chances are that many GNers fall into one of those categories.
I've mentioned before that I've suffered from chronic depression most of my adult life, although it's relatively well controlled. I'm one of the third of over 60s who isn't overweight - at the moment. However, every so often I have an acute depressive episode, when nothing matters and I don't see that I have a future. When I feel like that, I sometimes don't have the energy to eat anything at all and at others, I could eat everything in the house. I have to be very careful about what I eat and usually I am, but if I have a very black depression, I just don't care.
It is a fact that obesity is correlated with deprivation and depression. It's not unreasonable to assume that people who live in bleak surroundings with little hope of climbing out of them will 'comfort eat' with little regard to health warnings. Unfortunately, it's a 'chicken and egg' situation. People are less likely to think positively of themselves if they are obese, especially when people call them weak-willed gluttons. Less positive people are likely to become depressed, so will do something which gives them pleasure...and so it goes on.
I wish people wouldn't concentrate on the 'moral' (or lack of) aspects of obesity. It's a health issue and people very often need a helping hand, not a slap in the face.