Discussion: A significant proportion of COPD patients are smokers. The thought that addiction is a brain disorder is unlikely, mainly due to its enormous scale. A brain disorder is a "malfunction" of natural mechanisms.

Smoking is often an addiction, and the definition of a mental disorder does not fit the situation.

The article below presents a different approach to addiction and its reward mechanism, emphasizing strategies to increase the chances of a successful rehab from any addiction. Following self-healing principles, there is a close connection between addictions and the subconscious mind that often stores unresolved traumatic events. (Which we would rather forget)

Link: The Energy-reward Mechanism of all Addictions.
https://www.sf-healing.com/page/226 (Copy & Paste)