If freedom ought not include the freedom to risk addiction, it seems clear that it also ought not include the freedom to risk death, so skydiving, rock climbing, etc. are right out.
And since some currently illegal drugs (e.g., marijuana) are less addictive than alcohol, you'll doubtless be calling for either the legalization of those drugs or the criminalization of alcohol. Right?
All you have to do is follow that logic to its natural conclusion in order to federalize every aspect of human life.
Let's say a person is sick with a disease that is fatal if untreated, but a cure is available. Should the government be able to force him to spend his money on treatment, and to undergo that treatment?