The author has every right to write about what she wants but readers also have to right to know exactly what they'll be recieving once they start a piece of work. If you distort or misconstrue the impact of your work, for example showing the bdsm in sb as "ideal", purposely reducing/brushing off an assault victim's trauma, showing rape as "justified" or showing Duna as the "Queen of BDSM" then, it should be expected that many people won't be very happy with what they got.
The author has every right to write about what she wants but readers also have to right to know exactly what they'll be recieving once they start a piece of work. If you distort or misconstrue the impact of your work, for example showing the bdsm in sb as "ideal", purposely reducing/brushing off an assault victim's trauma, showing rape as "justified" or showing Duna as the "Queen of BDSM" then, it should be expected that many people won't be very happy with what they got.