"*forced* the publishers to sue"
I said "pretty much" forced the publishers to sue. Shall I restate that to "they invited the publishers to sue?"
Yes, until then the copyright parasites were working to promote the creativity copyright exists for, and were encouraging archive.org and everyone using stuff within a reasonable copyright term of five years.
No, obviously not, but there was plenty of stuff on the Archive that was less than your utopic five year threshold that they were lending out via format shifting on the premise that they had a physical copy that corresponded to the electronic copy they were lending out for a limited time, protected by DRM. It was a reasonable position for them to hold--the Supreme Court held in Betamax that time shifting was fair use, and format shifting is a necessary component of time shifting (in the contemporary of the decision, the format would shift from OTA -> magnetic tape).
The publishers did not sue because the possible downsides of a loss (format shifting protected by binding precedent) far outweighed the potential upside of a win (preventing a library from lending out a relatively small quantity of books to a relatively small quantity of readers). However, when the Archive unilaterally simply decided copyright law was null and void, and they would lend out their collection regardless of the number of copies they possessed, they "invited the publishers to sue them" with a set of facts that could not have been better for the publishers if they had invented the scenario themselves.
Their evil parasitical actions are totally archive.org's fault.
The (entirely predictable, from filing of suit to eventual decision) results of their colossal idiocy are absolutely, 100%, the fault of the Archive. They have set back the idea of legal protections for format shifting to a possibly unrecoverable extent, and did so by creating the exact handwringing scenario the publishers always predicted would come to pass. Fuck those guys for the damage they did, and fuck them even harder for making surprised Pikachu face when the (entirely predictable, from filing of suit to eventual decision) consequences came.