[luizsantana]

The problem is that is not one to one. And isolating diet is very hard. Muslin countries don’t do alcohol, but they smoke a lot more than in comparison to some other countries. As well as different general diet behaviours.

So as much as your idea has some logic, it is still very hard to get the right picture.

And now if we all are being honest, most of those studies are done with intention of understanding how much one can drink with much harm. So comparing a group of people who doesn’t drink at all with one that drink is not the correct data points. We all know that alcohol is bad. If people want to be healthy they can simply not drink. We don’t do studies to understand “how many cigarettes a day is good for your health” we simple know the best amount is zero. But alcohol is deep into our society habits