This argument is bullshit...In my younger days there were plenty of times I smoked myself to where I couldn't stand up, walk, or even begin to think about driving straight. If you smoke some good shit and smoke enough of it you will still drive like shit, you just don't feel like it as much as when you are drunk.

Alchohol fucks up your motoring skills and weed fucks up your motoring skills. You can get arrested for driving under the influence of both. Period.