No, ambivalence is the essence of the Addictive Voice / Beast. It is when the rational self allows the AV/Beast to engage it in an "argument", as though the argument has merit, that ambivalence results.
"Genuinely wanting to stop" is just a euphemism for that argument. Until someone actively decides to become a non-drinker or non-drug-user, the desire to quit is only a thesis and not a decision.
You are describing the Addictive Voice very well. Coming onto a forum implies interest, not intent.
FT