It's not the fat
It's the PALATABILITY, and there's a new paper that tries to define hyper-palatable foods (HPF *sigh*) and figure out their prevalence in our food supply. It's really interesting 1/
onlinelibrary.wiley.com/doi/full/10.10…

1 Fat+sodium (>25% of cals from fat + >.3% sodium by weight
2 Fat+sugar (>20% cals from both fat and sugar)
3 Carbs+sodium (>40% cals from carbs + .2% sodium)
62% of foods in USDA's nutrition database are in 1 of the categories
Fat isn't the problem.
Food is the problem. Specifically, combinations of fat and carbs that are cheap, convenient, ubiquitous, and irresistible. That's what's making us fat, and I'm glad to see some research focus on it.
OK I'm done.