That's an excellent point, any substance that alters your brain chemistry such as Marijuana, Alcohol, or Coffee can have a positive or negative impact. We are rich complex beings and everything we put in our body adds to that. I think many of the harmful substances can have a positive effect if used in a healthy way. We need to let go of either demonizing them for their negative effects or deifying them for their positive effects. Once we realize they're complex supplements that can be an enjoyable addition when used in certain circumstances while still respecting their potential for abuse we'll have made a big step forward.