They say write to be understood. But what's the point in spelling it all out?
It doesn't hurt to make an obscure reference here and there to keep the reader guessing. Said author Jonathan Franzen in lunch with the Financial Times:
“I think you have to have a few things that you have to kind of chew on to get.”
When you first listen to a new Radiohead song, something about it sounds off. But after a few listens, the sounds in between become just as important as Thom Yorke's lyrics. Nothing makes sense, but the emotional tug works.
It shouldn't be the author or musicians goal to demystify everything. The maker is often still figuring it out himself, going against their own interpretation.