I also am not a scientist; my observation that UPFs are responsible for food noise is based on the global correlation between the rise in UPFs and obesity. Unless we all, across the entire western hemisphere, collectively and simultaneously lost our willpower, something other than biology is going on.
I suppose the difference is down to individual make-up, i.e., hormone levels, gut binome etc. The same as some people can use opiates recreationally for years and then just walk away from them, whereas others develop a serious addiction after just a few doses.
I think everyone has "food noise" to some degree, it's just that some people are better at distracting themselves from it than others, not because of any personal failing, just because people are all different, the same as some people are better at motivating themselves to mop the floors while others procrastinate on MN for hours 
My mum is tiny; she always has been. She eats once a day in day-to-day life, almost always home-cooked, carb-heavy meals, followed by a chocolate biscuit, because she is "too busy" to remember to eat lunch or breakfast, but give her a day out or a holiday, and the entire trip is planned wholly around when, where, and what she can eat. We're going to the lakes in August, and she is already planning what snacks she can take and when she will buy them. Whereas, I have had issues with food for as long as I can remember and swing between extreme restriction and uncontrolled binging.
I could never be so busy that I would forget to eat, I could, depending on my food, choose not to eat for days at a time, or I could eat everything and anything in sight, whether I enjoy it or not.
Whichever cycle I am in, food is always on my mind, forgetting about it is not possible, but I don't give a fuck what I will be eating in August, I don't even know what type of food I will like in August, as that changes on a weekly basis too. Not long ago, I lived almost entirely on sugar-free yoghurt and jelly; now the mere thought of jelly makes me feel ill. I do not like jelly until next month, when I can only eat jelly.
I don't know exactly what changes in me where I can sometimes resist food to the point of starvation, but sometimes cannot physically stop myself eating until I am physically ill from it but I have noticed when I am restricting the food I do allow myself to eat in tiny portions are usually whole foods, lean meats and veg and a bit of fruit. When I'm binging, I tend to reach for white bread and/or fizzy jelly sweets and eating a vegetable wouldn't occur to me, so I do think it is linked to the types of food I eat.