I think you'll find mental health issue come from a range of areas, not just whether people smoke weed or not. To suggest otherwise and lamp all into that argument makes no sense at all.
As does you thought process tha tME is canabis based illenss. A cyclist I know is an ME sufferer and also my Uncle, and neither take or took any drugs. Beyond have a drink that is. So maybe Alcohol is to blame eh ?. No of course not, there are other factors at work there.
Theree have been a few cases recently of people making honey that way but did it in an enclosed kitchen which rapidly filled upp with fumes and exploded wrecking th e house and themselves. But i fear those individuals are more prone to accidents due to not having the presence of mind rather than being smokers.
I did see an ice bucket way of getting the scuff, but it looked quite complex and expensive so I can understand why they opt for the butane method.
Think you need to have some more research. Your premise cannabis doesn't cause psychosis is accepted to be generally true... But if you are in anyway susceptible to psychotic episodes Cannabis will find them. I had 30 years in Special Ed units with close links to both prison services and psychiatric wards... I can assure you cannabis lands many of its users in one or the other and often both. I had the unfortunate opportunity to try and help families involved, a common explanation was "they were fine until..." you get the drift.
Cannabis, especially in its modern form, simply is not the "soft" harmless drug many make it out to be. People claiming so are the lucky ones, with probably stable, well balanced, chemically stable minds. Unfortunately, that isn't always the case. Cannabis might not be the cause but it sure is a trigger and one to a set of circumstances that person would probably never have faced without dabbling.
And by the way its illegal. Eating cake, chocolate and fish and chips isn't. And neither is alcohol.
If you want to run risk of psychosis, lung cancer, throat cancer and various other issues... Get on with it. Good luck. But you really shouldn't be extolling it's virtues on here. But can't see you converting anyone... So better here than pushing drugs elsewhere.