As an infantry veteran with multiple combat tours behind me, I have to say that psychedelics (and mushrooms in particular) are the one of the strongest forces grounding me to reality and bringing calm to my everyday life. You may be right that there's no knowledge to be found in mushrooms, but there's heaps of wisdom to be had -- about yourself, the people around you, and the universe generally -- if you're willing to listen.
I meant this: There's no knowledge in the machines. There is immense knowledge to be gained in a trip, I had just realized how little a machine could provide me while tripping.