As for therapeutic use, I think more research is needed. If you were to use a compound as a medication, then just as for any other kind of medication, you have to know as a scientist but also as a doctor what is in that medication. Sorry to use this as an example, but if I had a bag full of pills, not knowing what is in those pills, I would not give any to one of my patients.
To be able to use something for medical use, you have to know what's in it. The regulation does not allow for that when using cannabis for therapeutic purposes.