Multiple Personality and Names: Robert Galbraith novels say the author’s name is a pseudonym for J. K. Rowling, but J. K. Rowling is itself a pseudonym.

The usual rationalization for “J. K. Rowling” is that the name of a female author on the Harry Potter books would have hurt sales to boys. But why wasn't the author’s real name put on the books after boys learned that a woman wrote the books and were not deterred from buying them? And why are the “Robert Galbraith” books still published under that pseudonym even though everyone knows, and the books themselves disclose, that they were really written by “J. K. Rowling.” And why do the Galbraith books say that they were really written by “J. K. Rowling,” when that is only another pseudonym, and not the author’s real name, which is Joanne (no middle name) Rowling?

Why has Joanne Rowling not wanted her own name on her own books, even after everyone knows that she wrote them?

My guess is that she is just being honest: “Joanne Rowling” is only one of a number of personalities, and not one who writes books. So the “Joanne Rowling” personality, being honest, does not claim authorship.