1. More often or not, I am in search of a single piece of information. Buying hundreds of pages of writing is not economical for this goal
2. Sometimes, I own the physical copy and want to search it. Buying a digital copy is a waste when I already own the physical one
3. Occasionally, the content is available to me via my library, but in the case of point 1, traveling all the ways is a waste of time. Some people don’t have access to a library.
4. Sometimes, I want to decide between two books, or see if the book has what I want before I purchase it.
5. A few times, the content I want disappeared, but there it is at the shadow library.