This is why I have major beef with the 12-step model (well, just ONE reason out of a whole fucking smorgasbord).
Because within that model, any deviance from total and absolute sobriety is MASSIVELY shamed and blown up into a big issue. It's taken to such extremes that in fact one single instance of indulgence means all your progress up to that point counts for naught and you're regarded as being right back to square one. You go six months without drinking then have a couple beers? FAIL AND START OVER.
Also, those couple beers will be regarded as equally bad as a week-long bender because you 'touched alcohol' .
This unrealistic perfectionism just practically invites someone who had a drink or two to go on that week-long bender, because hey you failed to be PERFECT and you already fucked up your 'sober record' now, FUCK IT might as will go all-out as it's all the same.
That system has self-sabotage built right into it. And THEN they wonder about the dismal 3-5% retention rate in those programmes...