No one can make an evidence-based argument that legal alcohol is less destructive to society than recreational drugs. There are many things humans consume, most of which are perfectly legal, that negatively impacts their health. We can't, or shouldn't, outlaw them.
As Americas, we have learned the the destruction wrought by making moralistic judgements on how people spend their recreational time and what substances they choose to do it.
Just as with alcohol, the moralistic laws we pass to outlaw recreational drugs cause much more damage than the drugs themselves.