Unclear why you'd use NBC News as your serious evidence.
I found the relevant article. No surprise that NBC News sensationalizes a rather weak article.
I'll do a deeper review, but my preliminary read finds that the "meta-analysis" makes a great show talking about THC as a CB1 agonist, but both pure THC and whole plant MJ stimulate all the endocannabinoid receptors (though in greatly varying degrees), some of which counterbalance CB1 effects. Then throughout the paper the authors mention "CB1 agonist," but do not make clear whether they used a pharmaceutical or the plant or both. I have already mentioned that MJ patients consistently report inferior benefit from pharmaceutical monotherapies.
The study also confesses the "heterogeneity" of the subjects involved, so admit that the subjects and their dosages were so diverse that numerous confounding factors (race, age of use, concurrent alcohol or other substances, etc.) undercut their admittedly "low" Confidence Intervals.
It's interesting, but weak. I'll do a deeper review.