My point is that generalisations cannot be made. There's a huge stereotype that everyone with a mental illness smokes. And that is just not the case.
I don't see that one can get addicted to anti-depressants. One tends to need them alongside emotional support to help stabilise the brain chemistry, and they're professionally prescribed.
I've had mental health problems since childhood, due to trauma and abuse, certainly not smoking, or the lack of.
And I actually am somewhat phobic to cigarette smoke due to health reasons and also associations of someone who smoked to a difficult period in my life. Perhaps that's part of the issue for me here.