Except books are already destroyed in physical form every single day. My local library has a section near the front for free and/or extremely cheap books ($1) they are desperately trying to get rid of. My impression is that if they are untaken/unsold they will end up in a dumpster.
[Edit] Here's an article from 2003 talking about how Random House destroyed up to 25,000 books a day: https://www.theguardian.com/books/2002/mar/19/fiction.stephe...