Perception

People that suffer from delusions (schizophrenia) have less limitations that society and we put on our own minds. I wonder if they can actually see a clearer reality then we can, a harsher truth, but just can't function in the process of what is real, from our world. Maybe they hold insight to a parallel universe. Maybe there delusions are really there, but our limitations prevent us from our sensory perception. I mean why do people do hallucinogens? Is it not to feel free, to perceive things in another light? We are so quick to label it with sickness or weakness, but is it just that they've evolved so much quicker then we have?