Wine is healthy. Wine is dangerous. All studies on both sides of this are totally inconclusive.

 

Basically, all the studies on both sides of this issue have non-causal conclusions because association is not causation.

 

This recent link talks about the flaws in a recent study on how red wine is healthy: A recent study suggests red wine may protect you from COVID. But I wouldn’t drink to this yet

 

This article uses basically the same argument (along with even more data errors) :Serious flaws found in Lancet study “debunking myth” of healthy moderate alcohol consumption

 

There was a botched attempt at better methodology back in 2014, but it was cancelled because of potential industry influence and bias and because its results would face been irrelevant to the general public. See: NIH halts controversial moderate alcohol consumption study.

 

For now, the conclusion is that there is no confusion, and that both sides are simply blowing smoke.