Your opinion that tobacco and alcohol in moderation are key parts of a healthy life is in the minority.
There was some evidence that pointed to some benefits to occasional minimal alcohol consumption, but in more recent years, the scientific opinion is that there are no safe amounts of alcohol consumption.
Alcohol has a side benefit that it generally encourages socializing, and being among people DOES have big health benefits. However, if you can have meaningful relationships and socialize WITHOUT consuming alcohol, that is even better.
I'm willing to bet that me stating that did not convince you in the slightest. However, if you read a book or two, were presented with evidence, written in more elegant prose, there is a bigger chance that you might be willing to start believing it.
Just stating things does very little, and that is why books are valuable.