My area of Washington State is conservative and the Washington State Patrol definitely is not shy about revealing accident information in any part of WA. Please post verifiable statistics about fatalities that occurred with the at-fault driver proven to be under the influence of THC only and no other drugs or alcohol. You will find that it is a pretty short list.
Now I will concede that driving under the influence of marijuana or other sense-altering drugs is a foolish thing and I don’t want to see people doing it. I am especially concerned about people getting a delayed “rush” while driving — even a couple seconds — which would be extremely disorienting. But OTOH, a recent controlled test showed that motorcycle racers were able to continue racing without crashing, even after consuming strong marijuana concentrates progressively through the experiment.