I fully agree with this. Someone else rightly pointed out that access to UPF doesn't equate consumption. Why are people consuming UPFs? I would argue because of economic hardship (being overworked), lack of prioritizing healthy activities and social encounters, ignorance, misinformation, and habit and/or addiction.

I think eating good foods should be every humans number one priority. "You are what you eat" may be cliche but it's true. Above all else, I think, people should be making time in their day to eat properly. Not enough people know how to cook using fresh ingredients. I constantly see claims that processed foods are so much cheaper than fresh foods. In my experience, it's the opposite. I mean, I just made a whole stock pot full of vegetable soup for less than fifteen bucks and it'll feed me for a week.

To your point, I think it's true that adding exercise to your daily routine contributes to a more positive mindset. I don't know if this is universal but when I'm depressed I eat more poorly. When I'm in a good mood, I eat more healthy. This would seem to be backed by biology and our innate need to consume sugars and fats for long term storage.