I hear you
@Pats and you are absolutely right about the stigma and the lecturing smokers sometimes get. It's often said that ex-smokers are the most sanctimonious and I try hard not to be that person myself. I'm extremely glad to have given up and I want to be encouraging to anyone else that wants to, but I don't want to make anyone else feel wretched because they can't or don't want to quit yet.
I knew how much smoking could damage one's health even back in the 70's and I spent years trying to get my father to give up. He couldn't but I didn't understand - I thought he didn't want to, didn't care how much it frustrated me, and I started myself in young teenage in an effort to leverage him into giving up. I naively thought that he would be so shocked to see me smoking he would want to give up himself and it would draw us closer together as we quit as father & son. Needless to say it didn't work - I just ended up with a habit that took me decades to break. He ended up with heart disease and bypass operations.
I think a lot of people feel justified in their condemnation because passive smoking is unpleasant and carries some health risk. If a smoker is keeping themselves to themselves when they smoke, nobody has the right to condemn. They may call you all kinds of stupid if they wish, but that is their opinion and usually doesn't bear any relation to the reasons or the social conditions under which you started smoking, nor why you may be unwilling or unable to stop.