The glass of wine is likely due to a selection bias in Tea Total people. Most people who are completely sober, are so either because they are recovering alcoholics, or have other health issues.
Most people who are healthy and have no prior alcoholism issues drink at least occasionaly, which introduces a selection bias favouring people with health issues as strict non drinkers, which causes not drinking at all to be correlated with worse health than drinking occasionally.
The glass of wine is likely due to a selection bias in Tea Total people. Most people who are completely sober, are so either because they are recovering alcoholics, or have other health issues.
Most people who are healthy and have no prior alcoholism issues drink at least occasionaly, which introduces a selection bias favouring people with health issues as strict non drinkers, which causes not drinking at all to be correlated with worse health than drinking occasionally.