Apart from the potential (but inappropriate) double-meaning of the word "closet"

...this is pretty accurate.

Ben Hecht:

The sad thing about writing fiction is that unless one writes classics one writes in a closet. Nothing can disappear like a book. The characters I made up are still alive...but in the closet always. Like all writers who have tried hard, I dream sometimes that the closet door will open.
-A Child of the Century (1954)