May I put another, maybe simplistic view?
Who defines a "psychiatric case"? And maybe, just maybe, instead of expecting and pressurising people to fit in with the world around them, we can look at it from a different angle..and realise that it's the world itself that is screwed up? Who makes the decisions as to what and what isn't acceptable in our society? The pressures that are put on us from birth onwards to conform to what society expects of us? Aiming, striving, achieving, always pushing for better because, well..that's what people do.
Who defines what is "normal"? And who defines what is "worthwhile"? Why should we have "value" because surely that is dependant on the views of others?
Just chucking some thoughts out there, certainly not wanting to be dismissive of the original post.