No proof whatsoever
You didn't read any of it.
Smoking anything is bad for lung health, does nothing to change the fact that marijuana is the safest recreational substance in existence, especially when ingested in any other way.
The safest in a group of harmful things doesn't make it safe!
“May supress the immune sustem” no evidence provided lol, unsubstantiated speculation, embarassingly weak
Here's what the research says:
"The review of published research shows that cannabis use may impair immune function in many instances and thereby exerts an impact on viral infections including human immune deficiency virus (HIV), hepatitis C infection (HCV), and human T-cell lymphotropic type I and II virus (HTLV-I/II)." Maggirwar SB, Khalsa JH. The Link between Cannabis Use, Immune System, and Viral Infections. Viruses. 2021;13(6):1099. Published 2021 Jun 9. doi:10.3390/v13061099
“Can increase risk of developing schizophrenia” also well documented that it has no chance whatsoever of causing schizophrenia in individuals that aren’t already hereditarily prone to developing it, at most it can accelerate onset
Again, more studies to help you:
"This adds to the substantial evidence base that has previously identified cannabis use to associate with increased risk of schizophrenia, by suggesting that the relationship is causal. Such robust evidence may inform public health messages about cannabis use, especially regarding its potential mental health consequences." Vaucher J, Keating BJ, Lasserre AM, et al. Cannabis use and risk of schizophrenia: a Mendelian randomization study. Mol Psychiatry. 2018;23(5):1287-1292. doi:10.1038/mp.2016.252
"To date, the research on the impact of its use has largely been epidemiological in nature and has consistently found that cannabis use is associated with schizophrenia outcomes later in life, even after controlling for several confounding factors." Casadio P, Fernandes C, Murray RM, Di Forti M. Cannabis use in young people: the risk for schizophrenia. Neurosci Biobehav Rev. 2011;35(8):1779-1787. doi:10.1016/j.neubiorev.2011.04.007
There are dozens more, if you need them.
I truly appreciate the time you took to read the studies. I respect that, however, the personal attacks are unwarranted, and you're more than welcome to debate the experts who've compiled the data, if you like.
Let's take things one at a time, but it should also be noted that much of the research cited are medicinal users of cannabis (including those prescribed by doctors), not recreational, which is what the actual OP is about. You avoided touching on any of those from the long list by the Canadian Centre on Substance Use and Addiction.
You conveniently left out the parts before that:
"Research suggests a link between cannabis, immune function, and viral infections. Cannabis use may be associated with adverse effects on immune function and, thereby, increase the risk of acquiring or transmitting infections such as HIV and HCV. "
The part you bring up has to do with viral progression, which is different. And the fact that more research is needed in this area (per the study), doesn't clear cannabis from harm.
The benefits of increased appetite in someone who is dying is great! Too bad, that has no relevance to the general population, so the risks outweigh the benefits.
That doesn't appear to be the study I linked, but we agree, increased risks.
But why did you skip the most important parts of the conclusion?
"Neuroimaging studies show the detrimental effect of cannabis on brain morphology, especially adolescent brains. "
"...there is still more harm from cannabis than benefits, and adolescent cannabis usage should be discouraged at all costs."
That's pretty damning for something considered safe, wouldn't you agree?
Trials... therapeutic CBD... that sounds considerably different from recreational use outside of a medical setting, no? Like the type of use they would like to see discouraged "at all costs".
Anyway, the study I linked is: https://pmc.ncbi.nlm.nih.gov/articles/PMC5984096/
"In summary, a genetic approach—representing an alternative to assessing causality when a randomized controlled trial would be unethical—strongly supports the hypothesis that use of cannabis is causally related to risk of schizophrenia."
This was my oversight, and I apologize for that.
That review paper was quite outdated, and the same author has a much more recent study available: https://pmc.ncbi.nlm.nih.gov/articles/PMC7646282/
"In conclusion, our findings confirm previous evidence of the harmful effect on mental health of daily use of cannabis, especially of high-potency types. Importantly, they indicate for the first time how cannabis use affects the incidence of psychotic disorder. Therefore, it is of public health importance to acknowledge alongside the potential medicinal properties of some cannabis constituents the potential adverse effects that are associated with daily cannabis use, especially of high-potency varieties."
I hope that covers it. There seems to be more than enough evidence to suggest that cannabis is not safe, even for being the "safest recreational drug".
Edit: grammar/spelling.