But no one is being sneery about people who are restricted in the way you describe.
It's been said multiple times that the system itself needs to change. If someone is temporary accommodation without the means to cook, there should be available and affordable microwave meals for them to access in the supermarket. Things like that may also help disabled people who can't cook, etc.
Would I judge someone living in temporary accommodation for eating a microwave lasagne? Or getting a McDonalds breakfast? Of course not.
Would I judge someone with major depression who managed to get up and shove a ready meal in the oven? Of course not.
Would I judge your average person who works full time, has no kids, and can't be bothered to cook so has a frozen pizza and chips for tea? Not really, as long as they don't try and tell me UPF free is impossible. It's their body.
Would I judge your average parent, who either stays at home or works PT or FT, has no issues more than anyone else on this thread, who feeds a steady trickle of UPF into their children's bodies? Yes.
Because most of these people have reading comprehension enough and common sense enough to know it's bad for them. Many have their own issues with weight or other health problems that can be attributed to diet. They know KFC isn't healthy. They know they shouldn't be getting that second takeaway. They know smilies aren't as healthy as normal potatoes. They know crisps aren't as good as fruit and veg and nuts. They see it in themselves, but they still give it to their children.
I think that's extremely unfair. They wouldn't let their child sit in a car filled with smoke, sleep in a cot with bumpers, not wear a seat belt. But they willingly give them food that has been proven to be unhealthy. And that's not even to start with the state of some kids teeth because of all the sugar; my friend is a dentist in a fairly affluent area, and she's disgusted by the way parents allow their kids to consume so much sugar and what it's doing to their teeth alone.
As a parent, it's my responsibility to care for my children. That includes diet and making good food choices, building good habits, and teaching how to cook.