The default human condition is something seen as depravity (partly by people who assume all people want is bad, i.e. cynics, partly by those say everything that a person could want is bad, i.e. theocrats).

I don't think that's always true, I think human nature is a mixed spirit. Stupidity and malice are always a deep part of human nature but so are prettier traits, many of which are demonized.
Through all these traits though, many expected feelings are "sickness" to some, from naive self-sacrifice to deplorable sadism. Being happy- the goal of life to some extent for almost everybody- could be classified as delusional by any doctor who dislikes you, or judgemental gate-keepers looking down on your life.

Religions for a contraversial example, often mandate nonsensical moral judgements regardless of who gets hurt and who gains existential fulfillment.
That seems like "sickness" to me.

Half the U.S. still gets a boner for murdering countless people. Many assume anyone being tortured in Black Sites are simply terrorists who deserve it. They see themselves as good people.
That's also sickness.

I could go on..
People, though they can be inspiring and admirable at times, can be such disgusting, repulsive monsters, so Sickness is par for the course. The worst I've seen on this site is barely a burp: Unpleasant but not a sign of anything seriously wrong. So what infects those who would take this from us?