Elaborate on what?
Using myself as an example, I have a job pre-screening drug test coming up. I literally, not figuratively, smoked 6-7 times throughout the day, every single day, for the last 6-7 years.
Every once in a while i have a drug test come up for different jobs, and about a month in advance I stop to get clean naturally and have no issues. Do i wanna smoke? Sure, i love weed. But do i feel a debilitating urge to smoke that absolutely must be satisfied? Fuck no, because im not a brainlet and can obviously put together in my mind that toughing it out and just waiting to pass the test to smoke is better because
job > weed.
The only people i know who are dependent on weed are that way because they literally dont give a flying fuck about stopping, and have no incentive too.
Give them a gun to the head, and i bet they will stop. Or some other good reason too.
Everyone is different, granted, and it may be easier for me to quit than the next guy. But it's not impossible, nor is there a chemical imbalance caused by weed, AKA physical addiction.