Pretending like one knows the triggering mechanism for Bob Marley's disease is absurd when no REPUTABLE medical professional or scientist would venture such pure speculation [or if they did venture it upon being pressured to speculate they would qualify it as PURE CONJECTURE]. Pretending to know and then using such conjecture as disinformation (in this case about Bob Marley) to support an overall anti-cannabis narrative is simply propagandistic.
THIS IS THE PROBLEM I have with throwing around scientific information without context, or regard for the state-of-the-science, in a loose and casual manner, and then representing such a slipshod treatment of the science as definitive or dispositive evidence for the sake of one's own argument. That's not science, it's CHARLATANISM.
You're NO AUTHORITY on this by virtue of having read some articles or being able to cut&paste definitive-sounding snippets out of scientific context. Even professors of medicine and toxicology wouldn't venture the kind of speculation you proffer here. If we convened a dozen medical professors in a room to talk about this every single [reputable] one would give the same answer: There's no way to know as we sit here today what exogeneous factor or factors, if any, played a role in triggering Mr. Marley' disease.
Accelerant effects? Immunosupression? Ganja smoke exacerbation? All pure unknowns in the case of Mr. Marley.
Believe me this get old for me too, but it's hard to sit back and say nothing when I see people misusing science and/or peddling junk science to sound authoritative.
You can talk Marcus Garvey all day long and I defer to your knowledge of the man and his history because I haven't studied it extensively, but when you start talking science, specifically exposure to carcinogens and their effects, you're in MY HOUSE. Nearly 4 decades I spent with doctors, epidemiologists, toxicologists et al working with carcinogen contamination, toxics exposures and public health, and the most common phrase out of their mouths when it came to attribution of disease causes was by far "there's simply no way to know for sure". I came to recognize over the course of my career that the really smart guys (the true top level, best scientists) were the ones who said "I don't know" the most often and the ones who always seem to have all the answers were often charlatans.