So yes, help similar to alcohol or drug addicts would likely help a lot.
But that’s the thing. For me it’s easy not to shoot heroin or drink 20 beers. For addicts it’s incredibly hard not to. And not for a lack of wanting to quit; they have a disease, maybe they’re on drugs to alleviate the mental pain of issues from their youth or whatever.
And just like anti drug advice isn’t “well stop putting that needle in your arm, simple isn’t it?”, anti obesity advice isn’t “stop putting that cheeseburger in your mouth”.