I, also, am in the Behavioral addictions are bullshit camp.
If the very idea of addiction exists in the way society and our legal and medical systems picture it then free will has been abolished indeed. (Notify philosophers: their long debate on this matter is at an end.)
AA, for example, begins by asking it’s members to admit they have no control over themselves.
The definition of the word according to the American Society of Addiction Medicine is, for that matter: “Addiction is a primary, chronic disease of brain reward, motivation, memory and related circuitry. Dysfunction in these circuits leads to characteristic biological, psychological, social and spiritual manifestations. This is reflected in an individual pathologically pursuing reward and/or relief by substance use and other behaviors.”
In short, there is assumed to be little to no place for conscious choice when it comes to being addicted, leaning very heavily toward ‘zero choice.’
And because this premise, in my observation, seems to be taken for granted in so many circles, the normal rule of demonstrating a position by a chain of reasoning seems to only apply to those saying its bullshit.