It is absurd if I can get the same book as a paperback for less money - it is the same book, after all (essentially, digital information). Unless you are one of the rare people who has a huge advantage from just having the book electronically (like if you are traveling all the time), it just doesn't seem to make sense.
The paperback is delivered for free, too - it takes longer, but as a reader, I have some patience (it takes time to read a book, too).
If I like the paperback, I can pass it on to friends.
Carrying books around is inconvenient, but I rarely read a book twice within a short time span, so I really only take one or two books when I travel. On the other hand I don't have to worry about leaving my book on my seat on the train when I go to the toilet.
Moving and shelf space are an issue, on the other hand book shelves look good. Some people even buy fake book shelves with fake books to decorate places.