[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4337025/
[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4827335/
Definitely seems to suggest there are potentially harmful side effects.
ever take tylenol? the pain killer that is available OTC virtually everywhere? do you know what happens if you take double the max recommended dosage? liver failure. for something that's OTC.
for all intents and purposes weed is harmless. In WA, most people that I know have tried weed and some of them are actually doing it on a regular basis. I have yet to hear of any [mental] health issues.
If you do something all day everyday you are dealing with something else and the drug is a way of escapism.
Do you think a few hundred people in the central government should decide how to handle those situations, or the people most intimately familiar with the details?
Does that mean you should do stupid things and ruin your life? Probably not. But this is not about doing stupid things. It's about having the option and the option not being constrained by arbitrary things (ie who gets to decide that A is good and B is bad, A is okay, B is life destroying)
also, one thing to consider: It's mostly non-controversial that pot is harmless nowadays. The more you go back in time, the more pot was painted as wrecking your life, a gateway drug, etc. So a lot of what the effect of a drug are can (and is) hearsay + fear-mongering.