Yes there are people who seem to ignore the harms. I think the first place we can all start from is that we all accept that there are risks associated with cannabis use (it is not always safe). Then it would be a nice step for all parties to admit that there are also benefits to cannabis use. Then I think researchers and users could start having a fairer dialogue, ideally one that would lead to policies that respect human rights as well as are good for public health.
I like your concept MJ but I think you have it arse about.. We have been bombarded with the risks associated with cannabis, we ( we =society) all know the risks because that is what we constantly hear about. I think the first step is for researchers, government and everyone else to accept there are benifits associated with cannabis use, both medical and recreation, then do a comparison of risk and benifit.