Your argument is seriously flawed.
I don't think that God intended for us to have to breathe into a paper bag. Breathing just as we are is natural. Smoking cigarettes is not something that the human body was designed for. It is not natural.
Smokers can always go outside to smoke, whearas I cannot go outside to live 24 hours a day. I guess you are saying that smokers should always have the upper hand on non-smokers. Is that correct? The one's not choosing to suck a bunch of poison into their lungs are considered the abnormal and unreasonable ones?
That's twisted thinking if you ask me.
You ready for that?
Get ready, it's coming.