Most individuals either find that model sufficiently useful that they don't need to expand it. Or, they're more or less fully aware of the gaps but still find that model useful. Or they don't find it useful and quietly use another model personally. All kinds of approaches in there.
If we're talking about 'the real world' then "It is never safe for you to begin drinking again, in any context" is a highly conservative and risk-averse approach, but it has been valuable for so many, and the consequences of relapse can be so high. AA is full of people who "went back out there" after 2, 5, 10+ years of sobriety because they thought they could reintroduce it into their lives and were wrong. Also many stories of people who did and just straight died in the relapse. Often our support networks can't handle another round, plus kindling is a real thing.
AA is where I first heard about van der Kolk's research, which demonstrates very convincingly that in some very real ways there's not a meaningful difference between "biological" and "psychological" components of trauma or addiction.
The AA framework has some incredible faults don't get me wrong. But above all those people are intensely, almost pathologically sometimes focused on "the real world." You'll hear some weird shit coming out of there sometimes because of that, but it doesn't mean they're not aware of the contradictions, or unwilling to apply more "scientific" models. Just, they have a system that works for a lot of people so they keep it going.