In most cases I think alcohol is worse than pot, though I don't think anyone should drive under the influence of either. I also don't think people should drive while talking on their cell phones.
Why drink and drive, when you can smoke and fly?
Alcohol is exceedingly worse than pot when it comes to operation of pretty much anything let alone a vehicle. EXCEEDINGLY WORSE. Numerous facts will tell you this.
Driving while clipping toenails is pretty bad too.