I suppose what is being said here is that you don't need external devices to get you where you want to go.
Too bad for people selling products.
On a discussion board for Salvia Divinorum (a plant used by Mexican Indian healers), one of the guys who had investigated the plant for a very long time said that even the curanderos believed that you did not need the divinatory plants when you knew where to go with your awareness. The plant served to initially show the way.
I think, quite naturally, we can access states of awareness and performance without outside help--without the risk of something that may end up becoming a costly crutch.
