Smoking isn't an illness, according to some, it's a lifestyle choice.
I don't agree.
People can, IMUO, turn to alcohol, drugs and/or smoking for a variety of reasons, some of which could be influenced by factors in their childhood, adult relationships, social situations or linked to work or financial stresses.
Self harm, anorexia, bulimia and obesity could also come under the same umbrella as could overdosing in prescription drugs.
All require willpower which has to start with the person concerned.
No-one else has the power to free you from the habit.
The Student Room has some very persuasive arguments re drink and drug use/behaviour.
You cannot have an 'I'll start tomorrow' attitude.
Unfortunately, as EllanVannin points out, smokers are treated differently although heavy smokers (of which I doubt she is one) do need as much NHS time as the others mentioned above, yet are told just to stop, which is as useless as asking a drug user to or a drinker to go cold turkey, definitely not advisable.
Most heavy users (or abusers of their own bodies) are liars which makes them harder to help. They cannot admit to themselves, the damage they are doing and nagging, for the most part, does nothing to aid their recovery.
It's a sad world when people rely on such crutches to live what they come to think of as a normal life, instead of enjoying moderate drinking and not 'craving' yet another glass/can or cigarette.
I've known husband and wife to lie to each other about the money they spend on drink and cigarettes and heated arguments and crying ensue after stashes are discovered or receipts come to light.