It is my opinion.....
.....that as an adult, nobody wants their government or anyone else, so far up in their deeply personal business, as to try to tell them what they can and can't eat.
.... Affordability, which like others say, the worst food is the cheapest in most places and being able to provide something.... anything.... as sustenance to someone who is financially challenged sometimes leaves very few healthy choices. Sometimes the lack of proper finances causes the poor to raise their children on these foods merely trying to survive, which in turn, gets those children in the habit early on, that many times may be hard to break. On these type issues, education may be able to help change a point of view somewhat... sometimes.
.... that obesity is more of an emotional issue, than a lack of education issue. Many obese people know about nutrition and most of the time, what healthy eating should look like, but for reasons that others can't image nor understand, are emotionally compelled to consume certain types of food that are not nutritionally good for them. Therefore, nutrition education and restriction will not help anything to solve the core problem. Nutritional/diet programs are not going to be successful if the emotional side of things is not addressed
I have often wondered how for example, someone with anorexia is seen has having an eating disorder and society recognizes that it is a condition that is mental / emotionally based and not a matter of education, yet those with the opposite condition, which is STILL an eating disorder, are treated as if it is different. I don't think it is that different.
...that it is a lack if understanding by people who are not obese to only see an obese person as an uncaring, uneducated, irresponsible person, who it is ok to call out or make fun of or treat with less respect than others. The obese people I know do care and are not personally proud of the condition their bodies are in, but the struggle is deeply, deeply personal and much harder than anyone else could imagine to fight.
Whatever people do, they should be kind to all, no matter their body type. Nearly everyone is trying to make it through their life the best they can figure out how too, whether others can see it or not.