As an avid marijuana user here, no, this is not the narrative that should be spread. As others have said, weed makes you incredibly impaired, just in other ways.
You are slower to process inputs, you are less likely to consider threats or obstacles as dangerous, to an extent your ability to judge distances is hindered, you are much more easily distracted (highway hypnosis, for example, becomes a huge problem - especially with blinking lights and whatnot), your ability to focus is oftentimes next to zero, causing you to be distracted often by music or other passengers in the car.
Plus, driving slowly in and of itself is a hazard - the "speed rule" exists for a reason. If everyone is going 30 mph over the speed limit on a busy highway, you are more likely to cause an accident by going the posted speed limit than if you were to go the same speed as the rest of the traffic - even though it's technically illegal.
So please, do not use marijuana and drive. Stay at home and watch Money Heist and postmates a McFlurry from McDonalds or something.