That is probably not true 100% of the time and there are alternatives. Relapse can occur as soon as they are reintroduced to the substance.
You’re associating obesity with food addiction. Which might correlate but it’s not always the case. There are metabolic issues and other things that play into obesity.
I know a girl who doesn’t eat any more than anyone else, but she is on mood stabilizers and can’t lose weight. She probably eats less than a lot of people out there(but drinks beer for carbs).
I mean it’s a funny proposition and all, but natural dopamenergic releases from food consumption are nothing like the opiate induced changes on the brain.
If I had to preach an approach to these things, Abstinence and moderation should be everyone’s focus regarding all pleasure. Learn to enjoy the default state of mind and the responsibly enhance it from there.