Question of the day

How are libraries filled with books different to libraries filled with videos and DVDs ?

Obviously, what they loan out is different. I'm not after that answer.

Why is one treated as a "public good" to be operated by councils and funded by taxes?

And the other one manages to operate by private enterprises where rentals are funded by people's savings. I'm not against the concept of a library that loans out books at all. But why do we still spend millions operating libraries for books, when they can be privatised and run like a business ?

(assuming there is some demand for books - which there undoubtedly is due to the thriving business of Borders, Amazon et al).