They can increase a chance to become unhealthy, but it doesn’t make you automatically unhealthy as idiots tried to claim.
Even if an individual person is healthy under these circumstances, it’s still an unhealthy lifestyle and idolizing such a person also promotes this lifestyle, which will lead to other people becoming unhealthy due to the statistically proven correlation of this lifestyle and various diseases.
What exactly is “unhealthy lifestyle”? For an unfavourable variation/specimen it can simply be being born and living. As I said, statistics is completely useless here.
I think that statistics are useful here. Statistics are useful in telling the likelihood that a smoker may get lung cancer, so why not in this case?