Rather of taking in oxygen in the morning, a buddy of mine smokes carbon monoxide. Upon questioning, he asserts that smoking first thing in the morning is a more beneficial way to begin the day.
When you ask a smoker while he is indulging in such act, they have so much to tell you about their reasons for smoking. Some say it gives them inspiration, some say it makes them not to to think of their problems and sorrows, as if they will be free from such after the light goes off. I have witnessed some smokers who go to defecate while smoking and according to him if he doesn't indulge in that while defecating then he won't be able to pass his waste. So you see that the government has a role to play in this by regulation how people can smoke because it also has some health challenges like you have mentioned. I think the rate of smoking is higher now especially among the young and youth.
Yes is like we have the same survey on smoker, in addendum to the reason some said it's the intake that help them eat and help the food to digest, why some said they can't sleep or have energy for any work without it, no smoker that don't have a reason for smoking, looking at their reason is it justifiable, in ideal society if you ask me it's no in most cases, even as some things human have right or freedom there are some smoking that have fine beyond normal which the government need tackle before it course harm not just for the smoker but endanger the society at large, where a full grown man or lady will first consider smoke before any other thing in their life, and some are so addicted to the point that if they don't take it is like they are not alive again and if they see any one taking they go close to beg them using the language called 'half me', it's extremely ridiculous.