Anyone who smokes every couple of hours is averaging around 8 times a day and hits that in under five months.
People who do not smoke weed have no idea how heavy, heavy really is.
Why do these studies assume weed is cumulative but alcohol isn’t? Is it because most researchers have experience with being drunk but zero to little experience with being high on weed?
It seems likely there is a difference between someone who is buzzed all day every day for years vs someone that smokes several times each weekend, but these studies all group them together as one. Most likely because the researchers don't understand what they are studying and produce results that do not match the lived experience of their research subjects.
Thanks for the clarification
To your point, AFAIK, the study doesn't differentiate potency of weed. Not all cannabis is created equal and the strands commonly available now are way more potent (with more arrows pointing to addictiveness) than "your dad's weed."
Getting this subthread back on topic, the study defines heavy (or medium) use - i.e., the problem categories in the study - as 1000+ (or 11-1000 days of usage). Are you a medium-heavy user?
I don't think you being an exception disproves the parent's generality that on the average heavy weed usage doesn't correlate with people in your position.