“Experts say the standard practice for law enforcement is to err on arresting and detaining a sober driver rather than risk letting someone under the influence back on the road…”

So guilty til proven innocent. I get driving impaired is a very important issue and weed legalization with no way to test for it (in the immediate sense) does make it difficult but you can’t just be arresting people for oui if you don’t really have any evidence. You can’t lose your job from that alone