I've only seen one episode of Game of Thrones, so I don't have enough information to have any opinion on this. But I do think that rape is something that should be used extremely judiciously as a plot device. Far too often it's framed exploitatively - and it's used to send a man off in a quest for revenge.
The most horrific thing I've ever seen in a film is the rape scene in Girl with the Dragon Tattoo. It wasn't used to exploit the character or to be sensational - it showed the reality of the consequences. To me, it was showing the audience the horror of rape and the psychological damage - which is important. That said, I can see how it would be tremendously triggering for a rape survivor.
None of these answers are simple, but I'm happy to see the conversation.