Interesting. So our obvious talent at it was not at all a useful thing evolutionarily speaking...and yet it evolved anyway...
Oral tradition goes back long long before the written word. And it is accurate history or knowledge even without being in writing. Take the Australian Aborigines for example. They are taught history through generational song and dance from a very young age. And it is absolutely imperative to them that the songs and dance are perfectly accurate with no mistakes or personal edits. To change them in even the slightest is taboo. So the history they share now with no written language is absolutely accurate from when the song and dance was first created thousands of years ago. So no written language is needed.
Ever judge a singer for how well they copy the song of an original artist? And that you very rarely say “She/he nailed it!”. This is how accurate generational oral history without writing can actually be. It is orally documented and it must be absolutely perfect before the previous generation all pass.