Psychiatrist: Breaking any habit is difficult, especially when it involves an addictive substance  People who break a habit are more likely to be motivated by immediate concerns than by long-term ones
Ttherefore, people who succeed in breaking their addiction to smoking cigarettes are more likely to be motivated by the social pressure against smoking -- which is an immediate concern -- than by health concerns, since
for most people who successfully quit smoking, smoking does not create an immediate health concern at the time they quit