What you "think" or feel is irrelevant. A real investigation by a respected authority (The Smithsonian!) found enough facts in Harper Lee's notebooks to determine that Harper Lee wrote Capote's work.
Capote was the hack living off of Harper Lee's work.
Capote was perfect for Harper Lee, as Harper Lee despises fame and attention.
By giving credit to Capote for most of her works, Harper Lee was able to have Capote enjoy the attention, which he loved, while she was able to live alone in peace, as she loved.
In this manner everyone got what they wanted, but the reality is that Harper Lee wrote it all...every word put to pen by "Capote" was written by Harper Lee.
She simply doesn't want the fame that went along with her great gift of writing.
Capote was her "face" to the world. Her frontman. He was never an author. He gave his name to Harper's use, that was all.
I get you Hackster; Harper Lee was the brains behind Truman Capote , writing The Grass Harp, Summer Crossing, Breakfast at Tiffany's and the like back when she was an airline clerk or in college. You can Go back to sleep now , your point (and you do have a point?) is made (incoherently , though).
The Smithsoniian also had an exhibit saying we nuked Japan because of Racism. Not saying that Lee didn't write the book (I think she did), but the authorities aren't quite what they used to be.
Well, until 1948 the Smithsonian claimed that Samuel Langley invented the airplane, so they're not infallible.
On the subject, it's difficult to prove authorship, particularly when the two were friends and worked together during the time of authorship. My gut feeling is this:
The book is Lee's work. Capote was likely a sounding board, but in essence, it is Lee's. Capote's In Cold Blood was an excellent book, but it never got the literary acclaim that Lee's book got. As Capote got older, drank more, and became more and more of a joke, I think he wanted to claim some of the adulation. With the possible exception of Breakfast at Tiffany's, most people probably couldn't name a Capote novel except In Cold Blood. For an attention hound like Capote, it must have been galling that his former assistant wrote one book that was considered far more of a classic than anything he ever wrote, and I think he might have been desperate enough to try to grab onto some of that fame.