Good example of how people overestimate the impact of these things. Closer to 10% of smokers get lung cancer.

But COPD, Emphysema and cardio vascular issues also affect smokers, it’s not just lung cancer.

Sure.but I don't think it escalates to a 90% death rate

It's actually a 100% death rate as all smokers sure. Jokes aside, your statement doesn't have meaning. Many deaths are not attributable to a single cause. However, it's been studies endlessly and is well accepted that smoking increases all-cause mortality.

Im not arguing against that at all. I was making a point about the magnitude of that impact.

People tend to over-estimate the impact of both smoking and obesity.