Great points! Can't agree more with you. I think at this point weed should not be even considered a drug. I believe it has very little negative effects if any and a lot of positive effect. There is an amazing video of OSHO (bhagwan rajneesh) about drugs, he sort of points out some of your points as well and gives a reasonable solution to all these drug related issues our society is facing now, check that video out on youtube search OSHO Drugs.