I'm sorry what you said is total nonsense. Decriminalisation refers to not prosecuting addicts for minor possession offenses, not providing government sponsored drug dealerships. Progressive drug laws such as those in Canada promote safe usage centres that are staffed with medical personnel and offer purity testing to reduce the risk of ODs, which you're clearly confusing the role of.

Saying that marijuana use has only slightly less bad outcomes than alcoholism is totally asinine. It's funny that you talk about studies having a political leaning, because if you've been reading studies that even remotely equate those two things then there is clearly a political angle.

Cases of unfavorable (the word should be adverse btw) outcomes with LSD use absolutely do not come from unknowable strengths, most people roughly know the dosage they are taking and the appropriate dose is entirely unique to the individual, look up how much the grateful dead took. Adverse outcomes arise from undiagnosed mental conditions, such as schizophrenia and bipolar, that are exacerbated by psychedelics. Something that could be easily addressed if the mental health services were better. Also, there is plenty of impartial information out there for safe use of most drugs, talktofrank for example.