I've been physically addicted to alcohol and opiates, and also a long term daily marijuana user (currently over a year of sobriety from all drugs). THC has no physical withdrawal symptoms.
And I've been drinking alcohol every weekend the last 15 years. Your alcoholism is a myth because otherwise I would need alcohol right now. It doesn't really work that way.
I was drinking at least a fifth (750ml) of 40% abv spirits every day, doing at least 250mg+ oxy or equivalent in heroin, or smoking a gram or more of weed a day. Alcohol and opiates are physically addictive with very real withdrawal symptoms. Falling asleep was somewhat difficult for a couple days when I ran out of weed. Marijuana is not physically addictive.