Just because one can theoretically be tested "positive" for a substance in the body does not mean that it is still affecting one's mental or physical abilities. Please tell me you don't think that pot affects one's motor skills and judgement NEARLY as bad as alcohol. They are not even close. Thousands are killed by drunk drivers every year. VERY few people are killed by a merely "stoned" driver. Similarly, pot smokers tend to use much better judgement when "under the influence" than drinkers do, and are less likely to drive when they are not fit, or to do any other equally-stupid thing.... Except maybe overeating.
Don't misunderstand.... I am not a pot-smoker, and have never done ANY drug, ever. I also do not condone drug use of any kind for others. I think it is a waste of time, money, and motivation.
However, that's not the point.
It is not my place to make that decision for others, and it is not your place to make it for them either. And it certainly should not be made by our government.
I have friends and associates who are moderate-to-frequent drinkers. I also have friends and associates who are moderate-to-frequent pot smokers. Given a choice, I had MUCH rather be around the pot smokers. They are INFINITELY more in control of themselves overall, use far better judgement, are less prone to excessive consumption, and are FAR less annoying and obnoxious when "under the influence". They are also not hung over and unbearable the next day, like many drinkers are. I know a LOT of people who have gotten into trouble (legal and otherwise) while under the influence of alcohol. I know of NONE who found similar trouble while just under the influence of pot.
Mike