> Both can be true at once, for exactly the reason described: the causal effect goes in the other direction.

still non drinkers do not live longer on average.

which totally defeat one of the few benefits associated to not drinking, unless you don't like drinking.

even if minuscule doses of alcohol increased the risk of getting some form of cancer, I live in a big city, I already increased my risk of getting cancer 10x by simply breathing ...

And I surely don't enjoy smog and pollution as much as I enjoy beer.

If I had to eliminate one of them, I would go living in the country, where air is cleaner.