Thanks for an interesting article. You mention guilt. Now why do we feel this guilt?
I think that we as a society have an ambiguous relation to health and food. On the one hand you have health hysteria,especially regarding food and excercise. On the other hand a lot of people have jobs that entails sitting on your ass all day,and a food industry that pushes all sorts of unhealthy food on people with agressive marketing.

Health and food has also become a class marker, with the middle and upper class being able to afford healthier food, and gym memberships.

Being more healthy and fit is seen as a proof of sucess,and closely tied to your attractiveness. This leads to stigmatisation of people who are unfit or overweight, and their food and excercise habits are scrutinized and critizised.

So in conclusion, most of us are neurotic when it comes to health and food, because of the prevailing norms in society and the messages that are being pushed in media and advertiszing.
These are just my random thoughts, and maybe obvious observations, but this is what comes to mind when reading your article.
You are upvoted and followed.