@slooploon why do you care who wrote the fiction you read? choose books because they are entertaining and well-written - if you do that, you'll naturally get a mix of authors from different backgrounds.
It would be discriminatory to say "I only want to read books written by cis white men", so does it not follow that it is also discriminatory to do exactly the opposite?
@slooploon Existing privilege doesn't stop them being discriminated against, and doesn't stop this discrimination being genuinely harmful to members of the group.
And anyway, it's senseless to limit your reading opportunities by something as trivial as the author's sexual orientation, race or gender. Just read what you enjoy!