Roger, from your previous writing I can only conclude that you are temporarily absent your skills.
Why is drink driving different than commercial transport? Gad.
A permanent loss of certificate (currently the effective standard) alerts others to conform to the restriction. Alcoholics will not conform to the Law, so this is a case of keeping the non alcoholics toed to the standard. Further, a revocation of ticket for even exceeding the minimum is a loud tocsin to those who can control their habits.
Massaging the standard on a case basis is misleading to those to whom the Law would speak. Re-acquiring the privilege at many levels tacitly permits a false sense of permission to those who would be borderline. If there is a problem in some way to prevent a personal bust of the admittedly low threshold, that individual is somehow less culpable? Justify a presence of alcohol in the blood if you care to, but for me it is permanently disqualifying to fly for hire upon doing so.