This is an interesting subject. Most people would be pretty worried about a drunk 747 pilot, and want laws and policies to prevent that from happening. A high delivery driver -- better, but a lot of people still don't like that idea. But tired commuters on the road at 6:30am is acceptable.

Could be better informed by numbers here. But hard to say because there aren't reliable tests for "high right now", and maybe not for "tired" either.