Using their standard here, we'd probably be equally justified in saying that alcohol reduces cancer risk.

I'd bet serious money that we could find beneficial hormonal effects, "greater absorption" of something "good" effects, and various other effects, using the same epistemic standards in this panel.

We already have reports of purported benefits of moderate drinking to heart health (boosting HDL), and reduced risk of Type 2 diabetes, gall bladder stones, and Alzheimer's. (Links below.)

I have no idea if any of those effects are real, but I doubt very much that the Surgeon General's claims of harms satisfy a higher standard of rigor than the claims of benefits.