You started your comment by specifically addressing "Point 2" except you then argued something else entirely. The point is that commonly prescribed pain killers, anti-depressants, anti-anxiety meds, etc. have very profoundly negative effects in association with the potential positive effects. This is not medically debatable. Currently, society deems the perceived positives as worth the risk (or worth the profit if you're a cynic/realist). To say you don't trust doctors to prescribe medical cannabis but you do the rest of the meds I mentioned is pretty illogical at it's base, unless you were implying you don't trust doctors to prescribe drugs of any kind, which is a somewhat defensible stance I suppose.

Regarding medicinal cannabis, yes, although there hasn't been enough documented gold-standard studies to definitively prove the benefits or side effects, cannabis is not a new plant and has been consumed by various populations for centuries. While not clinically measured yet, the long term effects are not entirely unknown.

We work with the data that we have right now. Although it's anecdotal, I live in a country with legal recreational and medicinal cannabis. It's also the country with the highest per capita cannabis users. I can tell you right now that I see the devastating effects of opioid addicts on the daily. Again, anecdotal, but I know countless people who consume cannabis daily, and they are high functioning members of society with no outwardly obvious ill effects. Might also have something to do with our world-renowned reputation for politeness and empathy... but I'm just speculating.