Fair points, and I agree with the impaired judgement thing too, and you're right it is a false equivalence.

I'll be honest...

What I meant to say was, talking from experience: when I smoke six bongs of straight or strong mix, there's no way I should drive a car. Mostly because I'm too busy laughing or sleeping.

Whereas last time I drank half a bottle of spirits I woke in a strange bed and could see my car out the window and had no recollection of how it got there.

Alcohol is one hell of a drug.