You have a point, obviously - but I wouldn't be surprised if mushrooms actually heighten awareness and response in animals and some people. Mushrooms tend to fog the mind only with regard to emotional responses. But other than that it seems one acts mostly pretty rational - only the perception seems to be changed. I took enough psilos and LSD to lose control of my ego and experience amnesia but from all I can say I never really acted irrational. Some tribes take psychedelics before hunting also.