The public does not gain when my work goes into public domain.
I disagree. I think society
does benefit when creative works enter the public domain. Ideas are pretty freakin' important things, even if they're creative ones rather than factual knowledge.
IMHO.
Don't confuse knowledge and learning with pure entertainment.
I differ with you, I think, in that I believe fiction to have more dimensions than just "pure entertainment." Fiction is often orchestrated to make statements about society, or to make the audience think, or to cause intense emotional reactions. Even fiction that is designed to be "pure entertainment" often touches people in profound ways, ways the creator might not even have expected. Stories can be pretty damn powerful things.
I don't think facts are the only things that are important to the world at large.
And I don't see fiction as a one-way communication, either, that exists only to be static, in one form, forever. I see it as a dialogue with society, one in which, in my perfect world, society would be able to talk back (as limited by sensible copyright, but for that discourse definitely to exist), thus deepening and enriching the whole marketplace of ideas.
And really, just what work has been lost to history because of copyright?
Many. My (layman's) understanding of the issue is that this is actually
a very serious problem. (Assuming that one is not indifferent to the preservation of culture, which I accept -- with minor heartbreak -- that some people are.)
Anyway.
Personally, I'm not sure what I think copyright law should be. Speaking about the U.S., as that's what I'm familiar with: I know I think the time period is too long right now. I know that I think there should be more protection for fair use, and better/easier defenses against
SLAPP lawsuits -- right now, what is considered "fair use" tends to be
de facto determined by who has the most money for lawyers. I like the idea of a renewable copyright, with limited renewals (and I think that will help combat works falling into obscurity when third parties would still like to resurrect them but are unable to because the works are still under a copyright that's owned by someone completely uninterested in them). Perhaps a renewal could happen for a fee, so if the creator is still making money, it makes it worth it to renew. I wish there were more acceptance for creators to choose to release some rights if they so wish (publishers have balked at allowing authors to publish under Creative Commons, and unions have balked at allowing movies to be filmed under it). I know I think the consequences for copyright violations in this country have pretty much gone off the rails, and that IMO it's a very serious problem of justice. And I
definitely think we need to stop attacking technology and the free flow of (legitimate) information in a misguided attempt to stop piracy (see SOPA, PIPA, DRM, the DMCA).
I definitely don't think copyright should be done away with entirely, though: I think it's a good thing to protect creators' abilities to make money with their work, and that copyright is, fundamentally, a valuable construct. But to me it's like the cool science experiment that got some DNA splicing wrong and is now a twenty-foot tall HORROR MOVIE MONSTER spreading terror instead of protecting people.