Yes but the internet has made libraries (arguably universities as well) obsolete for academic research, what is the difference between using my universities electronic journal searcher/Athens to using Google? I don’t read paper books using either!
Once you’ve found your articles, you access them. Until there’s open access to all publications, this is usually paid for by the library (assuming university here). The librarian’s help choose which titles are included – remember there isn’t an unlimited budget, and manage access. When it’s not working who sort’s it? The Library.
Using a database for an in-depth search will save you time. Try submitting a systematic review with the strategy “I used Google”.
A good Library will help you get your research done more easily, through training or doing searches for you. Important stuff with the REF and funding bids.
I’m a Librarian and I barely have anything to do with books. I use the internet all the time. Don’t think my job is obsolete.