This is backwards thinking. Your question should be; Why should weed be illegal. Everything should be legal unless there's a overwhelming reason for it not to be. Hemp vs Cotton and various other political points don't check that box.
It should be legal because you can't get addicted to it, can't OD on it, and it has never killed anyone. (Sure, car accidents or suicides have killed people, but that wasn't directly because of the plant.)
Can you answer why alcohol should legal? Cigarettes? Caffeine? Sugar?
You're asking what happens when someone breaks the law (dui)? Same as anyone else who foolishly gets behind the wheel of a vehicle when they're impaired. By this logic do you think we should make cars illegal? You can be impaired from being over-tired and hit someone, but we all know the risks of driving.
Is drunk driving the cost of doing business? How about just straight up motor vehicle accidents?
Yes, it's all about politics. You should look up why it was illegal in the first place. It had NOTHING to do with being dangerous to users.
Why do you assume weed impedes their skills? How do you think it impeded them rising to the top of their respective sports?
You could easily make a case that it helped them. Helps with sleeping, which makes you able to train harder. Helps with appetite, which allows you to get the proper nutrition. Do you see how many clean calories a day a professional athlete needs?! Not to mention as a pain reliever and not being prescribed pills that are known to be dangerous.
Like I said before, I do not smoke weed. It's just plain ridiculous to have the mindset that it should be illegal because someone might drive while high.
I do realize I sound like a pot sympathizer, and no, I do not think it's some magical plant that will solve all that ails the world, but I do drink IPA's and am simply using logic. Alcohol is without question worse for you, I don't think anyone here would disagree, would you JTR? I know the risks and I drink responsibly (mostly!), which I don't think there's anything wrong with. I wouldn't want my rights taken away because someone else makes the decision to get behind the wheel. (Same with guns, knives, etc)
Good luck, gentlemen. I am going to respectfully bow out of this discussion. There are some people that have had the propaganda machine brainwash them into one way of thinking, and I highly doubt that mindset will change. Then there are others, who are more open-minded, but just simply disagree, which there is absolutely nothing wrong with. Just seems like we are all chasing our own tails now.
I will be obsessing over the new Stella if you need me!