In this case, the correlation has to do with being health-conscious which leads to better health and is linked to ingesting o3. And the reason we argue causation is the simple fact that the mechanism behind the correlation is not explained in a clear chemical way.
So health-conscious people consume more o3 because the health authorities tell them it's good, but what actually works is some other thing they do, probably just avoiding obesity and sedentary lifestyle?
Exactly, and other behavior like thinking twice before ingesting something probably offsetd whatever harm health authorities may (perhaps unwillingly) cause.
In this case, the correlation has to do with being health-conscious which leads to better health and is linked to ingesting o3. And the reason we argue causation is the simple fact that the mechanism behind the correlation is not explained in a clear chemical way.