driving stoned is nothing compared to driving drunk or under the influence of psychedelics. If a person is a shitty driver to begin with they will probably be a shitty driver while high on weed but other than that driving is the same. You dont have to worry about swerving all over the road not paying attention to anything like when your drunk and you don't have to worry about your car doors disappearing and your car flying like when you're on psychedelics.

Marijuana isn't what i would consider a risky drug for driving. The worst case senario i think would be getting distracted by other people in the car while your stoned. If you're a good driver it shouldnt happen