I will make it even simpler so it is easier for others to understand as well.
For short:
Habits and Addictions are the same thing, a byproduct of the individual either not doing the things they find excitement/Happiness/Joy etc about or and being in a situation they feel not so comfortable about (which is the result of not doing what you feel Joy about as said before).
[ Personal Example:
My habit is to touch or do certain things X amount of times, same happens for my Sister or either she goes in Hysteric Moods or Obsessive Cleaning Habits, mother eats her nails when that is true and father+other sister smoke. ]
See... 5 people having Different Unhealthy Habits... It is not just Genes or Disorders, it goes way deeper as you can see and it is even more so way Simpler to resolve once conscious about it.
I see Habits as physical Messages.
People might blame their situation in others...
Which is the illusion that leads to unpleasant paths and situations Ironically.
Being aware that one is in full control and responsible of their own life and that there are infinite options is the key, follow your passions.
Following one's passions even leads to "coincidences" or Synchronicities that lead one to the most beneficial for them situation.
<3