I would take issue with the statement
"Most people enjoyed smoking cigarettes."
I met very few people indeed who 'enjoyed' smoking - they smoked in order not to suffer the symptoms of nicotine withdrawal.
People I have met who have been addicted to other intoxicants, like heroin, speed, cocaine or crack all say without exception, that giving up smoking cigarettes is much more difficult than giving up one or more of the illegal drugs mentioned above.