Libraries serve a lot purpose than you are giving credit for.

Libraries are a general facility for the public, they offer the standard books and other rental type arrangements although they are so much more than that!

- Access to computers

- Access to internet

- Access to printing

- Access to 3D Printing

- Access to Meeting rooms

- Access to Mental Health Services

- Access to Archive Rooms (newspapers, seed archives, etc).

They serve as a repository for everything physical. Most libraries have archive rooms with various artifacts from the region, including newspapers, publications, recordings, etc. Most of this stuff isn't available online.

Visit a library near a University or School and it becomes packed full of students researching and studying, even if most aren't accessing the books, the rooms, desk and facilities themselves are important.

Not everyone is willing to pirate books, willing to setup Synology devices, etc. A library grants an official place to access things in a legal way, easily (and for free!) among many other things.