Earlier quoted context omitted.
It always amazes me when smokers try to paint themselves as martyrs, because we keep trying to get them to stop exposing other people to their smoke. I'm sure it's inconvenient that you have to go outside and away from the doors to enjoy your habit, but if that's a problem then maybe you should have picked one that doesn't pollute so much.
Apart from the initial time they chose to smoke (and bear in mind it quite possibly might of been in a time where the health risks were far more contested) it's interesting that you suggest an addiction to be a choice.
Addiction might make it uncomfortable if you choose to stop using a substance but it doesn't use the substance for you. All action excepting reflexes are a choice.