if humans weren't sick fucked-up creatures with tangled desires, for status, knowledge, love, amusement, they'd be of no literary interest whatsoever
they'd simply be autonomous beings in possession of themselves -- how boring
your claim is entirely groundless and ludicrous.
some of (maybe all) the most breath-taking, amazing, and interesting works of art are made by autonomous beings in possession of themselves.
if you meet and talk to, or read the writings, biographies or autobiogrphies of some of the most creative contemporary people you soon realize how entirely juvenile, at best first year art-college, your romantic notions regarding "sickness" and "fucked-up-ness" is.
EDIT: i have in mind people like Gerhard Richter, Tim Hawkinson, etc.
also sure there are creative people who make worthwhile work who are fucked-up and miserable (or pretend to be, like Trent Reznor), like the Spectral composer who commited suicide. but this in no way means that relatively "healthy" people are boring. that is just absurd.