I'm missing your point bro; obviously heroin, meth, coke, crack, et.. are harder drugs to quit with harsher withdrawal symptoms. But even eliminating something as simple as caffeine consumption will lead to withdrawal side effects (minimal in comparison).
Is your point alcohol addiction isn't the same as hard drugs?
* I'm not trolling either.
Smoking is often deemed harder to quit than heroine.
Obviously, this is often due to the legal repercussions of heroine.
3. Cigarettes. In ratings by cocaine and alcohol addicts, smoking is regularly cited as the more difficult drug to quit, generally on par with or more difficult than heroin. Nonetheless, more than 40 million living Americans have quit smoking. While impressive, this still only represents about half of all of those ever addicted to cigarettes - although a higher percentage of those in higher socioeconomic groups have quit. When I speak to recovering people at addiction conferences I ask, "What is the toughest drug to quit?" By acclimation, the audience shouts out, "cigarettes" or "smoking." I then ask, "How many people in this room have been addicted to cigarettes but are now off them?" Half to two-thirds - often hundreds of people - in the room raise their hands. "Wow," I enthuse. "And how many have used any kind of therapy - medical or a support group - to quit?" Never have more than a small handful done so.