Yes, the TIQ/THIQ theory was misinterpreted in the early 70s and then latched upon by the addiction treatment centres, as support for the AA disease model from the 1930s.
The TIQ/THIQ theory has since been discredited, I won't add any links, because even a cursory search for medical/scientific referenced research papers with peer group references, will provide evidence for the discrediting. Unlike the OPs link, which is from an addiction treatment centre which seems not to have kept up to date.
However, I've also noticed many alcohol addiction studies state that certain people fare better in treatment centres, when they're advised their alcohol use disorder/addiction is a disease; so that's positive for the individual, if it works for them, to combat their addiction.