Shouldn't you?
PS: Not including the weird exceptions in the EU of monuments and such.
Somehow I have thought that monopolies are so generally accepted as harmful, that it would be the proponents of monopolies that have the burden of proof. Not the ones who oppose monopolies.
So instead of just assuming that copyrights are good for society, can you provide some evidence?
Other than that, just thing of photographers who spend their life working on photography. Copyright allows them to charge for their work, or for a software developer to charge for their work.
Removing copyright entirely means you can only monetize your work based on the marginal cost, the result is zero monetization for any type of work that has near-zero marginal cost, such as a book, movies, photography, etc.
Sure, you can argue that we should move to the fairyland dream scenario where everyone is beautifully funded by fans and so on. We've been there, it was how art in the Middle Ages worked.
Anyway, that is a separate discussion:
1) Given that copyright exists, should X be copyrightable?
2) Should copyright exist?
Not sure if that's the case but they do not have element of creativity. They just copy real world so why would they deserve any monopoly?