I disagree. ask anyone who has smoked and done anything that requires focus. (MMA, archery, cooking, NFL, NBA, etc). You are far more alert and cautious. Try it if you dont believe. Use a simulator. I am not condoning it because it is illegal. But people are allowed to drive on Aderall, or Nuvigil because they apparently increase focus. Let's not be naive about the fact that there's a lack of research into the effects of cannabis on humans.
RE: This highlights gov't hypocrisy perfectly!