We're animals. We're diverse. We're wired radically different to all other species - our civilization demonstrates that. The wild viewpoints and ideas that come out of different mental states pull our species to a net positive.

I find it bizarre that 23% of people could not be considered to have any sort of mental disorder. Everyone I've known personally has either dealt with one of OCD, anxiety, depression, narcissism, paranoia, or low self esteem, at different stages of life. One of mine and my wife's injokes is that we can't think of any close personal friends who haven't ever been on antidepressants except ourselves.