I ultimately disagree with Paul about that, but it's a morally serious argument. Even outright legalizers (Paul says he isn't one) aren't necessarily in favor of, say, heroin use. Rather, they argue that the costs of prohibition outweigh the benefits. Too many are imprisoned, too many are arrested, and too many die accidentally while being arrested. Well what's true of low-level heroin pushers is also true of low-level cigarette pushers. In the war on tobacco, like the war on drugs, if politicians will the ends, they must will the means.