The 108 lb female and the Drinking Question

If one would go to the BAC charts, the 108 lb female with one drink would be considered impaired for driving and have a content for .04% BAC when they walk out the door after finishing the drink.  When a minister propose "all things in moderation" with alcohol and states that there is nothing wrong with a drink or two, then conveys that abstinent minister is off in his interpretation of drinking wine and a legalist, where would that minister be in his advice? Liable, I would say.