"marijuana is far more likely than alcohol to be cause addiction"
Exactly the opposite is true: according to research cited by the National Academy of Sciences' Institute of Medicine, of all those who ever used marijuana, 9% have at some point been addicted to it - whereas the corresponding figure for alcohol is 15%.
The thing is that marijuana stays in your system for 30 days or so depending on how much fat a person has or how much they smoke/eat/vape. There is no sudden withdrawal when someone stops smoking. Alcohol, cocaine, nicotine (any "ine" really) is completely metabolized within 24 hrs. That's why there is withdrawal. With marijuana there is no physical addiction, but there can be a psychological one.