Both are dangerous, drinking in the short-run and smoking in the long run. I know very few true alcoholics, people who simply get antsy and agitated when they haven’t had a drink in a few hours. I know many smoke-holics and few smokers who are not addicted to smoking in some form or other.
There’s no problem in having a few drinks (or even a few more) every now and then, there is very little danger of becoming addicted if it’s limited to once a week or less. Most drinkers know to keep out of dangerous situations if they are about to partake in a few brewskies.
Smoking, on the other hand, can become addicting very quickly and it’s a quick step from the occasional cig to not being able to sit through an entire Yom Tov teffilah without taking a break in the auxiliary sukkah.