tobacco use leads to cancer is a 'might' too though. Its not guaranteed, or a definite, or a given. its a 'might', because it doesnt always.
Nicotine is a powerful addictive substance Aspartame is too, for many people. As are chocolate donuts and sex, and in one way or another, they can also lead to a person's death.
I am not dissing your side of the argument at all (because I agree with the vast majority of what you say), and I have no doubt that you're acting with the very best of intentions, and I'm certainly not trying to imply that people should purposely do things that are very obviously bad for them.
But you need to let people make their own choices, and there are very few people that want to be preached to. Preaching to the converted is one thing, but preaching to others can cause friction. Even with our own children, we can steer them and guide them and hope they'll see our way of thinking, but a) our way of thinking isnt necessarily the right one, and b) there comes a point where we need to let go, and let them make their own choices, and thats what my posts have been about. Choice, and moderation.
The subject of this thread could have been about Hershey bars or unprotected sex. At the end of the day, I dont feel its my place to either preach or condone. If you do, well, I still like you