We can barely even meaningfully define UPFs, and they aren't cleanly correlated with junk food.
Potato Chips are not UPFs but tortillas with an added preservative are.
Ice cream purchased at the store that has emulsifiers is a UPF. Homemade ice cream is not. But I think we'd agree that it is the fat and sugar in the ice cream that is the bad part to feed to kids.
I will go further and say that eating some ice cream does not hurt kids at all. No, you are not a bad parent because you gave your kid ice cream. And fat is completely legitimate part of food. Likewise sacharides.
It can not be your business and you're allowed to still have opinions on it. It's one thing to discredit opinions you think aren't someone's business - that's fine, maybe even understandable.
But everyone is entitled to their opinion, and you can't just make people shut up. It doesn't work like that.
If you feed your kid rocks yes I think you are stupid and yes I think you should've worn a condom. Whatever, who cares, listen or don't.
Lol iPad, social media, and processed food consumption is going to be your problem? OP was not talking about values, he was talking about the day to day specifics of child rearing.
“How the next generation of your society is raised is none of your business”. Take some ownership