to do nothing and blame genetics

You are doing the same, just a layer of abstraction and human constructing out.

Addiction, and the willpower struggle, are genetic. You are aware things like ADHD exist, yes? Abd that ADHD is genetic?

Willpower is inherent to psychological topology, which is an abstracted idea overtop of the physical makeup of your brain, which is heavily genetically influenced.

The other half is environment.

Primarily speaking, the combination of a poor environment (which most people suffer nowadays in the west) and a “bad roll” on genetics for what brain you end up with, and you become heavily predisposed towards addictive behavior patterns.

And while eating and obesity aren’t the only addictive behaviors, of course, they are both legal and highly available making them very common.

What I’d be curious about is how you think “willpower” isnt genetic. Are you suggesting it’s somehow an external force outside the human body…? That’d make no sense.

Largely speaking this sort of statement is just an attempt to discard establish science by just smothering a layer of abstraction overtop and pretend it’s something else.

“Willpower” is not a quantitative established metric, OP. How do you measure it? How do you quantify it?

Dopamine exhaustion, decision fatigue, and executive function however are established concepts that are easier to discuss in a serious manner.

Would I agree that obesity has a comorbodity with poor executive function? Yes, 100%!

Would I say that executive function isn’t genetic? God no, it’s heavily genetic, when it is particularly bad that’s literally called ADHD.