You can always find a downside to anything you ingest.
I think you’re correct, the best approach is to explain “safe limits”.
Personally, I think it’s fine if people smoke, drink, etc until their heart is content. That said; it’s also why I’m opposed to socialized medicine. Almost everyone I know on social medicine didn’t take care of themselves (only a maybe one couldnt take care of themselves).
The challenge with socialized medicine is that we should now push to ban alcohol, logically.