Even if study results are in suspicion. Discrediting them would require an independent study. Why counter-productive? Smoking is good for you, right?
Tobacco is one of the most if not the most studied substances, the strong influences already popped up. "Hey, lets all socialize on occasion of burning our health". It is good that there is social pressure against smoking, because otherwise there would be (and was) social pressure to smoke.
It is only natural for a person to see "healthier, longer life" without any other qualifiers and circumstances as straightforward benefit. I am sorry if suicidally depressed or deranged ideologues feel excluded.
PS. All that said, I am not for banning or too aggressive taxation of smokes.