So what? This is about stopping drinking. When they’re ready they’ll stop smoking.
If you are happy with the solution to stopping drinking being becoming addicted to cigarettes that’s fine. But admit it’s trading one addiction for another. And it’s expensive and it will kill them a different way.
I never thought that a good solution for someone with an addictive personality is to just change what they are addicted to. If it was something healthy it wouldn’t be a problem. But smoking is far from good for them.