I have a really good book on the pyschology of addictions.
Marijuana is addictive, just not in the means most think of as addiction.
Physiologically stopping marijuana use is of no concern
Psychologically it could cause issues however if the user stops. But again, it's vastly different from other addictive compounds.
Show me any activity or compound that is enjoyable, or eases burdens, and it's psychologically addictive in some sense.
I've never seen marijuana use destroy a family though, unless it's through illegal drug dealing. Not saying it doesn't happen, I'm sure it does. I'm not buying it on a scale that one would seem a significant issue.
Also, new studies are suggesting marijuana usage to be safe and effective means of treating addictions and even improving mental health.
Opiates for example, withdrawal can include violent bouts of naseau(marijuana treats that), use causes weight loss and poor nutrient uptake(marijuana treats that) opiate withdrawal effects proper sleep(marijuana treats that) opiate withdrawal creates dopamine and serotonin imbalances(marijuana treats that), opiate withdrawal can cause heavy bouts of physical pain/discomfort(marijuana treats that) opiate withdrawal can cause seizures(marijuana treats that)
I mean, just to name a few. This list is 100% true of alcohol withdrawal as well.
The more marijuana is studied, the question is quickly becoming "why isn't everyone using marijuana products"?