Video discusses that while smoking does not cause all problems that a person may experience while being a smoker, it causes lots of them while aggravating others.

Link to 2010 video covering similar topic as well as addressing how not all symptoms a person may experience after quitting are caused by nicotine withdrawal. It is important to be able to understand what symptoms are related to smoking and quitting, and which are not. 

Related resources:

• "Is anyone else experiencing the symptom of…?
• "Is this a symptom of quitting smoking?" (part 2)
• Life goes on without smoking
• When you may really need to talk to your doctor about quitting smoking