I think there's an important difference to make, I know a lot of people who have smoked once or a few times and have not become addicted but I don't know anyone who smoked regularly and didn't become addicted.

On the other hand for alcohol, I know a lot of people who will have a glass of wine whenever they go to a nice restaurant yet are not addicted.

So there's a magnitude of difference. Nicotine is significantly more addictive for anyone who uses it semi regularly whereas alcohol is not as addictive in that case.