I may be speaking from inexperience here, but the problem you're highlighting is a big circular clusterfuck.
Going back to ancient times, once a book is published the first time, it can be copied. When book-copying labor (scribes with pens) was scarce, books were scarce--but at the same time, anyone could be in the business of copying books, if they had the education and a steady hand; demand for more books was virtually infinite, as there were plenty of libraries or individuals that would pay for a copy of, say, philosophy, or math, or something else interesting. (Of course, it was dependent on local demand specifically, or any travelling traders you could sell to, and those are different...) When book copying first became industrial (printing press), book publication (both copying and first edition) became a centralized industry, with a large overhead that had to do with labor, machine costs, and transportation. But because you were doing it in bulk, you could absorb the overhead with margins on each book sold instead of sustaining yourself on a sell-by-sell basis.
The book industry now faces two problems: it's incredibly easy to print things (albeit in variable quality), and book copying is now digital: instantaneous and costing virtually nothing. We are back where we were at the beginning, where anyone could get into the business of copying books--and thanks to digital communications, books created anywhere can be printed and distributed anywhere. Book publication as a centralized industry can only exist with the digital equivalent of mercantilism, which means that book publication as an industry needs to use its money as a leverage to prevent the industry from collapsing.
Basically, if the entire book industry collapsed in a pile of dust tomorrow, and there never again was a centralized book publishing regime, we wouldn't lose access to many books. There would be lots of scanning and trading, and a lot of books published digitally and independently, either to be printed locally or used on some sort of reader. Maybe--maybe--certain authors that could only thrive on a centralized industry would fail, but a new decentralized industry would be born. Basically the only people who really, severely don't want that to happen are people who depend on the system as-is, and unfortunately, many of them have been filling out their wallets on those margins for a long time. It'd be nice for them to stop being selfish, but their worldview and their current jobs rely on this system, so I guess it's only to be expected that they think in those terms.