I certainly agree about trans-fats. I would never suggest they're healthy. I don't think satiety is the full story about why fast food is unhealthy, nor just the lack of nutrients. It seems to be actively bad. And I'm obviously not focusing on only the fats used during cooking, but I was responding to a comment about palm oil, not about nutrition in general.
Edit: I'm not convinced saturated fats are healthier, either, but I think the science here is very sketchy and generally of low quality.
It matters how much of that stereotypical food you eat, and the totality of the ingredients.
Plus how sedentary people are, how many snacks they eat outside of meals, hobbies, work, and a whole host of other factors.
The general scientific consensus is pretty clear that saturated fats are unhealthy, trans fats are the worst, and dietary cholesterol seems to not impact serum cholesterol. Science marches on,
These are not novel discoveries, this is mountains of research done over the last couple of decades. Cut down on saturated fats and tilt your balance of unsaturated fat more towards omega-3.
The reason why fast food is unhealthy is not because of the specific oils used (and all of the ones you mentioned are much better than the trans fat nightmares we used to deep fry in). It's unhealthy because it's super heavy in calories, and because they're almost entirely carbs and fats and low-quality protein, and almost completely bereft of vitamins and minerals and fiber. The fat+salt+carbs combo keeps you from being satiated until you're stuffed full.
Focusing solely on the fats used during cooking is myopic. You have to look at the whole picture.