>But muh lungs
Then don't inhale retard.

>But muh picture of blackened lungs
That was proven to be a picture of a coal miner's. And again, don't inhale

>But muh addiction
Just do it in moderation. I only smoke on the weekends, and have no problem avoiding it on the weekdays

>But muh smell
Smoke outside retard

>But muh second-hand smoke
No real proof it has a detrimental effect on others. And just don't smoke around non-smokers