Joe,
Feel free to do some reading yourself. Studies not using your super concentrated synthetic drug which of course isn't found in real pot got the opposite result, far greater loss of the brain cells in the hippocampus. Every claim made about benefits of marijuana is refuted in a dozen more studies.
I did read about your claims of as safe or safer drivers on marijuana. Seems the theory is that they are more paranoid and that makes up for their greater physical limitations. Here is a fun fact for you: According to one of the reports below,
45% of people hauled over for reckless operation that have not been drinking have been using marijuana!
I haven't noticed any insurance company change their policies concerning testing dirty for THC after your studies and I am still waiting for the blue collar workplace to endorse smoking pot since it makes for safer workers. I think I'll be waiting a long time before either of these things happen. Surely these studies have been cited in court cases yet I haven't heard any news of a radical change in the way marijuana and safety is viewed.
How many of your fighters smoke before a performance to increase their physical abilities? I don't doubt some take a hit or two to fight the butterflies if they aren't tested but I don't think I can find one that will claim the levels generally accepted as needed to have a buzz increase physical abilities. Many years ago I drove short track with a couple of drivers that liked to share a joint before a race to smooth out their nerves. They made handy lap counters.
At the end of the day you have a few studies that say what you want to believe and hundreds of studies and endless real world experience to prove differently. Interestingly, the Netherlands and other countries in Europe that liberalized marijuana laws have tightened back down and started campaigns to discourage it's use. Seems they were wrong.
Have fun boys but at the end of the day, marijuana still causes cancer and respiratory disease, damages brain cells, and causes behavioral changes. I don't blame you for grasping at straws and deluding yourselves, much better than admitting how foolish it is and still using.
Hu
http://www.nida.nih.gov/ResearchReports/Marijuana/Marijuana3.html
http://www.usdoj.gov/dea/marijuana_position.html#delinquent_behavior
http://www.friendsdrivesober.org/docs/marijuana_driving.doc