Carl is a very precise person. If he meant, "whose health is not being damaged," he would have written that. Instead he wrote "whose lives are not being damaged." One of the diagnostic questions used to differentiate between addiction to alcohol (for example), as opposed to harmless recreational use is, "Are you having more financial, work, school, and/or family problems as a result of your drinking?"
The act of smoking may interfere with family or work, but nicotine use per se does not. For those in need of relief from symptoms of depression, anxiety, memory impairments, and attention deficites, nicotine can increase the odds of avoiding financial, work, school, or family problems.
I'll be writing more about this in one of my future Anti-THR Lie of the Day posts, but for now, suffice it to say that I don't believe that nicotine fits the same profile as addictive drugs that impair cognitive process and judgment.