Well, he’s also written about murders.
So what’s worse to write about?
Rape that never actually happened or murder that never actually happened to characters that don’t actually exist.
To be murdered is worse than being raped, is it not?
So why not George Murder Murder Martin?
Especially considering that many more murders have been described in Westeros by Martin than have rapes.
because his middle initials are RR and there is a rape in the books like every 17 pages apparently.
(from someone who actually read them)
might have exaggerated I guess