Bread, cheese, yoghurt, pasta, bran flakes... So many foods are UPFs but they won't make you fat just becausethey're UPFs. Just like they didn't 50 years ago.
50 years ago they tasted pretty vile. I remember getting a ready meal lasagne in the 1980s and it was like soggy cardboard and ketchup. And pizzas were a thick, bland base with grated mild cheddar and some squares of something that was possibly once tomato or red pepper.
Manufacturers since then have put a lot of time and effort in making high calorie ultra processed food taste pretty good. Unfortunately it does matter WHAT you eat as well as overall weight, where your fat is stored etc, particularly in terms of type 2 diabetes. A lot of these foods have a kryptonite ratio of fat, salt, carbs and sugar, are a lot easier to come by, and cheaper than fresh food, certainly by the calorie, and I think do something to disrupt your perception of fullness, probably as there is so little fibre and texture.
For example most of my meals are likely about 400-600 calories and I eat about 1500 - 2000 calories a day but I could easily put away a Big Mac meal and McFlurry, say, and consume about 1500 calories in a few minutes and only feel as full if I'd had a normal balanced dinner.
Also alcohol is so cheap and easily available, and calorific. My parents never used to drink at home apart from special occasions, in the 1980s. A few beers and glasses of wine here and there and it's a lot of calories and can also mean you make other poor food choices after.
Takeaways are so easy since JustEat and Deliveroo arrived. The fact you don't even have to go and pick them up makes it so easy and tempting, particularly for people who are not very good cooks.