I have, it was worse than cigarettes but better than alcohol, at least from the outside looking in. He wasn't a joint a day kind of guy but multiple times a day, every day, for years. He was also a particularly addictive person who was a smoker and alcoholic as well. It isn't common, but until very recently it was hard to get the amount of weed it took to develop an addiction. I expect there to be a lot more now that cannabis is as easy to get as alcohol.
So funny thing about addiction is that it usually is a genetic predisposition based on a neurodeficiency of either dopamine or serotonin.
When we consume anything... food, booze, porn, pot, gambling, watching a sunset, social media "runner's high", etc... it releases those neurochemicals, develops neural pathways in our brains, and those neural pathways become "push button, get banana" impulses that our brains give out to those brain chemicals.
Some substances or processes affect others differently, as well as the damage they can do to people physically, mentally, and socially. Additionally, the impact of the substance and process can wane over time as they become habitual. That's why I could down a 2-4 and feel nothing after a while. It's also why chugging coffee does fuck all for most of us, compared to my 16 year old.
There is so very much that impacts how and when a substance or process will affect an individual. It's actually both brilliant and terrifying to think about how our brains can lead us to self destruct if we let them.
That said, it's risk assessment, risk mitigation, and (sadly) societal norms that dictate what is an acceptable "addiction" and what is not. A lot of times, it doesn't become an issue until it's affecting someone else.
IMHO, alcohol, cocaine, methamphetamine, and opiates are at a much more damaging societal level than cannabis, caffeine, or other psychotropic drugs like Psilocybin or LSD (under control and supervision ofcourse). In any of it, too much of something is always bad.
All this to say, it's not the poison that you're addicted to (and it can vary across generations and populations) its the dopamine is giving you.