But there is arguably a physical dependence at that routing usage. First thing every morning, every 1-2 hours another J. I wanted to quit almost every day. I'd have conversations with my partner about quitting every few days. But neither of us could. If we had none we wouldn't sleep for 48+ hours, just didn't happen. Anxiety sets in, stress about everything. You just want to sleep, so you smoke. You go broke you scour the house to find enough coins or bottle to return (EU here) to get .2g to roll once to just get to the next day. You leave the house to do anything and you're so anxious and paranoid you become misanthropic. Only way to deal with it is to go home and "relax" to manage the borderline panic. Just for reference, before I was maybe a bit awkward sometimes but had absolutely no issues with the outside world.
I also don't agree that afterwards you're in the clear. I used to be borderline photographic with my memory. I'd pull random statistics from papers I'd read years earlier in conversation with references that I could use to validate when challenged. I no longer can even remember what I decided to go to the grocery store for, even though it's a ~2 minute walk. I forget what I started a sentence to express while typing. I'm a systems engineer, when I change tabs in an IDE I lose nearly all the context I took with me to the new tab. Sure context switching breaks flow yadda yadda, but it's just different. I don't even remember there was something to remember, just... "why am I here again?"?
I do agree that the behaviour trigger is very strong, so I replaced the urge with League, an arguably far more self-destructive tendency.
It's not like the DSM is some infallible book of mental disorders backed by rigorous mathematical proofs. Rather, the DSM-V seems to be constantly criticized, lacking evidence, culturally biased, etc., and it mainly benefits health insurance companies more than patients and clinicians.
FWIW, the DSM, ICD-11, Neurology, etc. all have differing definitions of the word addiction.