The nature of writing solicits authenticity. If it isn't authentic, readers will know it. Readers are astute enough to know when they are being fed inaccuracies in stories and characters. How could they know that? Writers -- this is important. Readers know when a story line and a character are inauthentic, no matter what kind of fantasy it is, because elements of the character and story will be unbelievable, irrational, and phony. If a writer has not set up some structure to make the idiosyncrasies of stories and characters plausible, all the hard work that went into the written work was for nothing.
Keep your pen moving with authenticity because if you don't, even you, the author, will lose interest.