I think it is worthwhile considering why people abstain from drinking. Long-term abstention is typically not motivated solely, or even in part, by some moral compass but rather by contraindications. Given the number of potential drug interactions, symptom-exacerbating effects and bodily stresses, stresses which people with life-shortening conditions typically cannot handle well, alcohol is probably not removed from otherwise healthy individuals. This is no different from the observation that people that buy treadmills are fatter than the average. Do treadmills make people fat?