To oomis,
I agree with you- people shouldn’t smoke -I think I posted it many times. I also said if I was a Poisek, I would say it was OSSUR! But, my posts were discussing the Halacha aspect of smoking. The reason Rabbonim permitted it was because it’s more similar to crossing a street than it is to jumping off a building. So you can apply the heter of “Hakol Doshin Bo”. Granted, there are many reasons a person smokes, but the main reason is not that he wants to hurt himself as opposed to jumping off a building. You should know crossing a street is dangerous -I think there is a pedestrian accident every 45 minutes in NYC.