Smoking is very addictive. I do not smoke but my Chavrusa does and he is trying to quit but it is not easy. He smokes much less than he used to though, and I would call him a Ben Torah. and Health- Smoking is not comparable to any of those cases, you clearly are very against smoking and I too am not a fan but it doesn’t mean that someone who does it is not a Ben Torah, especially those who are trying to quit. Like I said everyone has different Ta’avos and especially for those who have never been smokers how can we expect to understand how hard it must be to quit after they have started, even if they really want to quit.
Obviously I am not saying everyone who smokes is doing the right thing but I am still saying that just because someone smokes doesnt mean he can;t be a Ben Torah. You have to look at the whole person not just ONE aspect!