Say you need to research some scientific algorithm or other, you paid $40 per paper just to do that? There will be 3-5 papers that are must-read, so $120-$200. Then there's another 5-10 papers that are referenced in the former, you might want to check, just for the few paragraphs that are referenced, which may contain crucial elements of the algorithm you are trying to write (often not explained in full in the original papers).
Even if you have that money to spare, wouldn't your research be hampered by the choice you stand whether that one extra paper at $40 is going to be worth the money?
"Piracy" is a very nuanced subject, depending on what/who you are talking about.
I also have a book at a major publisher, with an outrageous price, and when I saw it "pirated" I only felt joy at the fact that more people will get to read it and thus my work is more meaningful. And I also downloaded it myself, because I actually didn't have it in PDF, only in physical form.
Since when have we asked authors permission to add their book to a library? In many places (including the US) if you publish a book it is mandatory to submit it to a library.
As far as I know, libraries in the US purchase their materials like anyone else. They have the right to lend due to the Doctrine of First Sale[1], because what they lend they legally own.
>In many places (including the US) if you publish a book it is mandatory to submit it to a library.
According to Wikipedia, in the US publishers are required to submit two copies of a published work to the Library of Congress[0], not to distribute copies to public libraries.
[0]https://en.wikipedia.org/wiki/Legal_deposit#United_States
[1]http://www.ala.org/advocacy/copyright/copyrightarticle/libra...
Not in the case we're talking about here. Sci-hub doesn't provide copies of novels. It provides copies of scientific research papers, for which we, the public, have already paid with our tax dollars. The payments to journals are not deals between those publishers and the scientists; they are deals between those publishers and the government, to get us to pay again for something we've already paid for.