Maybe for current in print books, but the concern is about rare books being pulped in this process. If a book is rare then it isn't in print, so nobody is making money out of it.

A book, song that has been out in public-domain for more than 10 years, should be downloadable. Even if you were to rebuy the same CD again the amount that the artist received would be a pointless pittance. Why not just let it be free to be enjoyed by all?

OCR Scanned for training, then tossed away or burnt. Great for nature.