DJPLong, I understand your point. My "immediate" family member has worked and was taught acupuncture for herion addicts at a Crisis center in the South Bronx in NYC, is qualified by the Caron Instutute, worked in detox centers, has had private patients, received "court" directed patients. Has run group sessions. Has dealt with all forms of addictions, (e.g. marijuana, cocaine, heroin, alcohol, co-dependencies, etc.).
Her experience has been that a certain number of users move from marijuana to other drugs. That after using marijuana the brain has been effected and the person is definitely impaired. Marijuana will impair the brain but most users don't like to hear this. Of course not all marijuana users move to other drugs, but to deny marijuana users brains are not impaired is to deny documented history of the drug. Because a marijuana user smokes it and then stops does not mean the drug did not effect the brain. An educated
person on the subject knows it does and understand the user will have some form of long term effect. It is important for adults to understand this as
they can give good advise and care to the youth who want to try it. THere are manny books and articles on the subject and those who want to use have the responsibility to understand the impacts of their decision.