I am a mid-list author. I am not so successful that I will do fine whatever happens, nor am I so unsuccessful that writing is just a weekend hobby for me. Like many authors, writing is my career, but it's on a knife edge, and every sale counts. I've sat for an hour at a signing table just to sell four books, and I would again.

I spent five years working on my last book. People complain about 'legacy publishers', but I couldn't have done that without the support of a legacy publisher. Everything that further chips away at my sales reduces the chances that my publisher will be able to support me in the future, and so it reduces the chances that I will be able to put that same time and effort into another book. By 'liberating' the literature of today, these people are strangling the literature of the future.

The most important reason authors should be fine with libraries lending out "their" (the authors') books for free is that libraries lend out their (the library's) books for free.

The linked article mentions Colson Whitehead, Neil Gaiman, and Alexander Chee, and the Twitter threads have other authors, although I didn't recognize any of them.