Why don't the mentally ill stop smoking?

I would guess that the last remaining smokers often have a diagnosis or
could get a diagnosis.

I would guess many people would ask why the mentally ill don't stop
smoking? It is, after all, going to reduce their life expectancy.

There is a simple reason. They're fucking cool. Those who so easily
stopped smoking only started because they wanted to be cool. They're the
sort of people easily swayed by peer pressure. When the peer pressure
changes they change with it.

The mentally ill on the other hand. They're just cool and that's why
they'll keep smoking when it's uncool to smoke.