The article points out that medical research on cannabis is inconclusive and insufficient. But it fails to mention that one of the main reasons for this unfortunate state of affairs is the political paranoia and subsequent legal difficulties involved in conducting cannabis research [1, 2, 3].

[1] Challenges and Barriers in Conducting Cannabis Research. Committee on the health effects of marijuana: An evidence review and research agenda. National Academies of Sciences, Engineering, and Medicine. https://www.ncbi.nlm.nih.gov/books/NBK425757/

[2] Why Is it So Hard to Study Pot? Rolling Stone. https://www.rollingstone.com/culture/culture-features/why-is...

[3] Medical cannabis research. Wikipedia. https://en.wikipedia.org/wiki/Medical_cannabis_research#Unit...