At a glance it seems to be a correlation so it could just be that people who live longer also tend to drink more coffee for whatever reason (maybe as you sugges

At a glance it seems to be a correlation so it could just be that people who live longer also tend to drink more coffee for whatever reason (maybe as you suggest they are driven, competitive, and use it to stay alert longer). I think the same is true for casual alcohol consumption. In other words, it would be a stretch to suggest that coffee consumption is strictly beneficial.