Good posting. Not only do substances such as red wine have actual chemical properties that are beneficial, moderate drinking or social drinking is also indicative of a healthy coping mechanism that reduces stress. Excessive stress is implicated in any number of disease processes that shorten the lifespan. Not to mention making the number of years one does live miserable years indeed.
I agree. If one drinks too much, it usually means there's some underlying issues going on. Drinking moderately helps you deal with stress better but alcohol also improves the overall blood lipids which may explain why they have less risk of heart disease.
Excessive drinking is WORSE than no drinking but if you want the maximum health benefits, moderate drinking is the best unless contraindicated.