Pressure to move stuff would mean it wasn't sitting around
Well, that's the thing... Properly curing weed to prevent mildew means... Just letting it sit around.
Moving it before it's cured and dried will mean it mildews quickly, especially after it gets bagged and is warm+moist even for a single day.
Have they ever actually shown that? The drug-caused accident data is horribly contaminated by an obsession with showing drugs to be evil.
Yes. The Canadian data, I think it was, was very damning of mixed intoxication.
Even research linked by NORML makes this observation (that's ultimately where I last brushed up on studies on the topic).
Some studies do get conducted with the goal of finding drugs to be evil, and every such study that exonerates stoned driving throws in "driving high could be dangerous" type language, but repeated attempts to find that have all "swung out".
Oftentimes people will even hold up the mixed intoxication cohort to impugn weed, but even given the bias you mention, this is about the closest any study gets, beyond discussing specific effects.
I do recall a study where they tried to hold up a decrease to reaction times as damning but even then, the overall crash culpability didn't actually increase: observations indicated that stoned drivers just adjusted how they drove to account for their decreased reaction times.
I can speak from experience (not driving) that weed doesn't affect the part of the brain that alcohol and opioids do that makes a person unaware of how badly they are intoxicated. Mixed intoxication is so bad specifically because these drugs operate on different systems... But as soon as alcohol or opioids get involved, drivers stop compensating for their condition, because they become unaware of their condition.
There is startlingly strong agreement with the data, well supported "plausibility" arguments as to the reason for this, and pretty much anyone who has ever gotten 'twisted" will agree. FWIW my own experience heavily corroborates that: I can smoke a LOT and I'll only ever feel stoned, but as soon as I drink a single beer afterwards, it will feel and act a fool (recognized only after the fact) as if I was doing kegstands, vomiting and all. I've never made as much a fool of myself (or vomited quite as much) as when I've gotten twisted.
I think mixed intoxication deserves a special penalty because then people would have a cultural awareness driven by whatever propaganda discusses it. It would be a good soundbite and something for people to complain about and increase awareness with.
I would recommend digging up NORML's page on high driving literature, since that's where I started on the subject and it's surprisingly complete, and mostly from government funded studies IIRC.
Or weed helps with the symptoms of schizophrenia.
Well, I'm being careful enough to not just discuss schitzophrenia. Schizoid and Schitzotypal personalities also tend to smoke a bit, and when I'm stoned I do notice that I pull back the blocks on my own schitz* temporarily, and let the faucet open on that part of my thought process more.
For some, I imagine that this leads to some very unfortunate results, especially if they mix alcohol with it (stripping their ability to even understand what they are saying), but my mind will go to absolutely WILD places on weed, and that is not necessarily the best thing for people with schitz*.
I have a friend whose sister has a much more powerful schitz* complex than mine, and sometimes reality just takes a hike for her. One minute things will be normal and the next minute the cat is God and she's on a quest to save the sun from martians or some shit. It's not usually good for anyone to "open the faucet" on that kind of thing.
For me, it usually just allows me to consider ideas that I would disregard more readily in "default mode", makes me less prone to proofreading, and causes me to write more run-on sentences or drop more words than normal. On a really heavy stone, I might end up dropping whole sentences.
So I don't think it treats Schitz*. But... Honestly, it feels really good just opening the faucet on that. My expectation is that people who have more pressure on that faucet get more enjoyment from opening it up? I could be entirely wrong though.