Other Cannabis Risks
It's fine if you support pot legalization, but at least be aware of the true risks even if you're willing to accept them. DON'T just listen to what the pot lobby has been promoting. Here are some reliable facts, references and links.
Click here for a fascinating report on how the early marijuana adopter states are doing.
Also, here is a recent study on total financial cost/benefit of marijuana in the state of Colorado.
INCREASED SUPPLY
AND BLACK MARKET
ACTIVITY
MARIJUANA, PSYCHOSIS AND SCHIZOPHRENIA
Excess supply means greater availability at lower prices. What happens when there's too much supply? Basic economics... prices drop and producers look for alternate sales channels. Some find their way to the black market.
Legalizing reduces crime? Note in this article, too, how ineffective the 'track and trace' systems are for catching supply chain anomalies. California's track-and-trace will be no better.
The black market is generally healthier than ever with legalization because it can tap into two different supply chains. Note, too, that as supply goes way up, prices drop, and government percentage-based tax revenues go down, too.

LEGALIZATION AND INCREASED USE
Despite promises from the pot lobby, legalization has resulted in an increase in use. Any increase in use is severely problematic, period. Note in the Washington report (the fourth one, below) the spike in calls to poison control centers in 2014 when pot was legalized.
Pot and Increased Use Links:
https://jamanetwork.com/journals/jamapsychiatry/fullarticle/2464591
https://www.colorado.gov/pacific/cdphe/marijuana-use-2017
https://www.rivermendhealth.com/resources/marijuana-legalization-led-use-addiction-illegal-market-continues-thrive/
https://www.ofm.wa.gov/sites/default/files/public/legacy/reports/marijuana_impacts_update_2015.pdf
https://www.vox.com/identities/2018/8/20/17938388/marijuana-legalization-more-use

POT USE AND DEPRESSION
Large and recent epidemiological studies have highlighted the link between marijuana, depression and suicide. People starting cannabis use in their formative teenage years are particularly susceptible.
Cannabis and Depression Links:
https://www.sciencedaily.com/releases/2019/02/190213172307.htm
https://www.psychcongress.com/article/cannabis-lightens-mood-may-worsen-depression-over-time
Marijuana is NOT merely associated with mental illness and crime. Years of independent and cross-correlated research have proven, finally, what pot promoters would prefer you not know. Cannabis use DOES cause schizophrenia and psychotic episodes. This is not U.S. government propaganda, as the pot lobby would have you believe - ironically, most of the research and epidemiological studies have originated outside of the United States.
Cannabis and Psychosis Links:
https://www.thelancet.com/journals/lanpsy/article/PIIS2215-0366(15)00167-4/fulltext
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC135493/
The acute effects of synthetic intravenous Δ9-tetrahydrocannabinol on psychosis, mood and cognitive functioning
https://www.ncbi.nlm.nih.gov/pubmed/16018929
https://link.springer.com/article/10.1007/BF03033802
https://academic.oup.com/schizophreniabulletin/article/31/3/608/1894455
LEGITIMATE VS. DUBIOUS MEDICAL CLAIMS