See. You've actually fallen for it. The whole 80% of people with lung cancer are smokers means that if you smoke, you will get lung cancer.

Truth is, you will likely not get lung cancer if you smoke.

Only 6% of smokers will get lung cancer. You have a slightly worse than 19 in 20 chance of going through your whole life smoking and not getting lung cancer.

Now, in your statement itself, you move the goalpost. You start with cancer and end with "a deadly disease". Because, yeah, smoking is also linked to several other bad outcomes, not just cancer.

And it is fair to compare those other diseases when talking about why we demonize smoking way more than other things. But we can't do that by focusing on cancer. That's disingenuous.

And it is fair to say that the correct number of cigarettes to smoke is 0. The correct amount of alcohol to consume is none. And the correct BMI to be at is between 18 to 24.