And it isn't just the marijuana but marijuana products. like the oils they smoke. Very potent products and as you said you cannot predict what is too stoned. One toke, two....etc. There definitely are and will continue to be traffic deaths due to the legalization of marijuana. Before it was legal people weren't out in the open doing it. They were at home. I never saw and smelled so many baked people until we legalized.
The problem is that there are loads of people here from elsewhere who see 'nothing wrong' with getting baked, who think (yes, I said, "think) they do just as well baked as sober. Uhhhhh.....No.
People from areas which have not had the same performance standards inherent in a region where the weather can kill you six months out of the year over a stupid oversight may not do well here. What's worse, that attitude gets little to no pushback from the media, and by that absence of objection is deemed by young impressionable folks to be correct.
Some day a lot of people are going to die because someone didn't do their job right while they were high on weed or 'products', and often it is some simple oversight that snowballs into a major problem.
I grew up on a farm where the current "evil weed" was grown. No, not pot, Tobacco. I'd rather smell tobacco smoke than pot, especially the skunky stuff nowadays, but I may be biased by the labors of my formative years.
What I think is funny is that those who smoke can't smell the residual odors on their clothing, in their cars, etc. I won't ride in a car that reeks of weed, and I recall telling one person (who was shocked by my comment) that if he ever gets pulled over, they'll search the vehicle. He asked, "Why?". I laughed and said "It reeks of pot." He couldn't smell it. About two weeks later he got stopped over a turn signal or something, they towed the vehicle after searching and finding paraphernalia, and then thoroughly searched (like the customs folks do), and when he got it back the interior required a lot of work to be reassembled.
It is illegal here although there are guidelines for medical usage being drawn up.
Which brings up another aspect. When you fill out the form 4473 to purchase a firearm, one of the disqualification question specifically mentions the use of marijuana. A quick cross reference between CCW, Form 4473 info, and medical permits will have some folks losing their guns under current Federal law.
Buy a gun and answer that question "no" after getting a 'medical permit', and you've perjured yourself, which is a Felony and a long term disqualifier.
Now, who is pushing this and why? And why would people be so stupid as to fall into this trap?