Weed makes driving more dangerous, lowers motivation and focus, etc. You want to do that to unwind, fine. But do it at home or in a designated smoking area I can know to avoid.
Marijuana, on the other hand, slows your reaction time and hampers decision making, as well as (in a small percentage of people, but including me) triggers depression, paranoia, and psychosis. Although it is legal to have and to smoke where I live, you still can't do it while driving a car or in public spaces. Doesn't seem to stop people though :\
You lost me there.