Without a way to flawlessly record and maintain books, music, and movies, works would inevitably be lost, or of poor quality, so people needed new works to be produced, or there would be no copyrighted works.
What the hell are you talking about?
We've always been able to flawlessly copy books. We haven't always done enough of it, but we've always been able to. And music and movies can generally be preserved and reproduced fairly well if some care is taken.
Copyright interferes with the preservation and reproduction of works by imposing additional costs on archivists and outright impeding copying and distribution.
We put up with it, to the extent that we do, because we hope that it will spur the creation and distribution of more works which will enter the public domain as fully and as quickly as possible, since it is only when works are in the public domain that they are of the greatest value to the public. Specifically, we hope it will spur the creation and publication of more works than if we didn't have copyright, with the ideal law being the one that spurs the most but impairs the public the least.
You're wrong about the market too; most works have a very brief window of copyright related commercial viability. It can be measured in hours to, at most, a few years. (A typical novel, for example, will make most of the copyright related money it will ever make within a couple of years of first being published.) This is why old works are generally available fairly cheaply. Yet people always want the new things. Even if we abolished copyright altogether, people would still want new things.