Honest question...open to having my mind changed on this...
If ideas are a dime a dozen and story possibilities for each of us are endless, then doesn't registering for a copyright equate to overvaluing one's content?
You don't copyright the idea, but the expression of the idea.
In other words, you copyright the story, the piece of music, the artwork, not the idea communicated by that work. It's called "copy" right because you claim the right to reproduce (copy) the physical expression of the idea.
We are claiming the right to profit from our own work, and stop other people from profiting from it without our permission. How it that over valuing?
We live in a world that pays lip service to creative work, but denigrates creative workers. If we work despite the fact that we don't make money, we are called self indulgent navel gazers. If we do make money from our work, or try to, we are sell-outs, whores, or "too commercial".
Many of us have internalised this attitude. Fight that. Creative work is work. Having ideas and turning them into stories is a marvelous thing to do, whether or not you get money, respect, or status from it. It makes life a little bit more worthwhile. Valuing yourself or your work is normal and rational.