Serious questions: What are the actual dangers of driving while high? If we can somehow normalize the amounts, which is more dangerous to driving: Smoking weed or drinking alcohol?
Alcohol is probably worse.
Allowing people to research cannabis would let us know what the risk is.
(I expect it is higher, but that seems hard to produce meaningful data. Self reported? Subject to a blood test? A piss test that detects 2 months use?)