Yeah, I got my opinion from this (long) review & discussion of
The Hungry Brain:
Book Review: The Hungry Brain | Slate Star Codex.
There are certainly *other* causes of obesity in addition to hyper-palatable food.
Dieting is not that hard for me, but not everyone's body works like mine does.
There's a product mentioned in the link above, "meal squares".
They are a meal-replacement product (a bar/biscuit thing) that is safe to live on, but deliberately designed to be only tasty enough to eat if you are hungry :-)
Haven't tried them myself.