Part of being a good writer, is knowing whether what you just wrote is something you want published under your name.
Lots of times, unpublished stories and songs were unpublished for a reason.
True, but the reason isn’t always because it is a bad piece.
Sometimes it is because it is outside of the tastes of the author’s established reader base, and would be disappointing to that audience.
Juggling a raft of pseudonyms isn’t just to hide from the limelight or meet contractual stipulations, it helps deliver different works to different audiences.