That science should take into account it positive effects on society at large. it’s possible society wouldn’t exist without alcohol. There are customs about drinking with new partners (tribe leaders, business leaders) because until you see them with their shields down you can’t trust them.

https://longnow.org/talks/02022-slingerland/

There’s also a lot of joy people get. Removing that joy might be a net negative over all. It’s like another said, cupcakes, ice cream, candy, donuts are bad for you but people get joy from them so we just encourage moderation