Most of the arguments put forward by people in this thread are of astoundingly poor form... the fallacious nature of such content only serves to demonstrate the willingness of otherwise uninformed individuals to spout their unsolicited worthless opinions.
Firstly, many smokers fail to understand that they are the societal equivalent of the obese person who sits next to you on the plane. Even the supposedly intelligent ones seem oblivious to the fact that in practising their own liberty they are impeding the liberty of others. Secondly, out of those smokers who do appreciate that being able to smoke is a privilege and not a right, only the addicts (irrationally driven) ones complain about the price. If the costs of smoking are too high for you, quit. If you cannot quit, get help. Nonsensical arguments about being 'priced out' are shamefully pitiful and only hurt your cause and your credibility.
Now on to the real villains, the so called 'opponents'. Most of these sanctimonious degenerates are so deep in their own hypocrisy that only an idiot of equal measure would give them the time of day. These fickle creatures will blindly shout about any statistic that even hints at a possibility of them being right. They fail to understand that any realistic attempt to quantitatively asses the costs and benefits of smoking in even a remotely meaningful way would be met with failure. Not only because of the objective nature of the subject but also because of sheer intractability and general apathy.
Smokers do not need more presumptuous individuals telling them how they are killing themselves and gaining no pleasure from it! NHS budgets and the woes of asthma patients rank near bottom in factors influencing most smokers. Yes those things influence government decisions about taxation but since smoking is highly price inelastic anyway they have little effect above generating revenue.
The one thing that does actually make a real world difference is the smokers own health. (everyone wants to see their kids grow up etc.) This is why as health awareness has increased, smoking prevalence has seen a global downward trend.
What is the shocking conclusion? ... People care not what you think. They are self interested. Any attempts to coerce them through manipulation will probably make them hostile and they will respect you less for it. This is no longer about smoking but about the attitude with which we approach any such debate.
Everyone needs to stop regurgitating the same manufactured opinions that already plague daily life, especially in the passive way social media has encouraged you too.
tl;dr
this discussion is more pointless than than than the opinions of those in it, myself included