It's all part of the trap set by the addiction, which is based on quite a clever confidence trick. For many years as a smoker I firmly believed, as all smokers believe, that the cigarette I was puffing away on was in some mysterious way relieving my symptoms of stress which were (of course!) caused by my hectic lifestyle and heavy responsibilities. Interestingly, this confidence trick is so subtle and so clever that most lifelong non-smokers have fallen for it too. Even people who hate smoking and have never touched a coffin nail in their lives are usually convinced that the smoker relieves his terrible stress levels by being a slave to his deadly addiction. How bizarre!!
It took many years for the penny to drop in my head. The stress I was trying to relieve was actually caused by falling nicotine levels in my bloodstream, which had been created by the previous cigarette I had inhaled, along with all the others before it. Honestly, the revelation hit me like a sledgehammer.
I suggest that we should not rush to be judgmental when we see smokers puffing away outside Christies or any other hospital. They are almost universally good and decent people who are imprisoned by one of the strongest and fastest-acting drugs known to mankind. The illusions it creates prevent most of its victims breaking free before their doom has been sealed. Feel for them, and thank God it isn't you.