the article doesn't discuss the discovery and documentation of the ECS - endogenous cannabinoid system. We know that cannabinoids definitely have strong physiological effect on many different tissues and organs in the body, that's far more important than western medicine's endless quest for double-blind controlled studies.
Many discoveries of the ECS do not involve patients at all, they study the effect of cannabinoid molecules on specific cells like nerve cells or cancer tumor cells. There's a ton of evidence of positive medical effect.
Let the giant Pharma companies dick around finding the ultimate "proof" in large-scale controlled studies. For individual patients it matters not! The only study that matters is the one of yourself, with sample size n=1. It's very easy to take a prescription med for a while and then stop it and use cannabis for a while. You quickly see which one relieves your symptoms.