Not only that, but the library is just great to use.

• You have free access to people whose job it is to be incredible at finding shit. I've spent ten years in a hobby where 80% of the work is just tracking down proper sources, and I think I could mop the floor with a layperson at that; I am scared of how inept a librarian would make me look by comparison.
• Libraries are great for research beyond books; they often have vast digital (or sometimes microfilm) archives with information you may literally not be able to find anywhere else.
• In an era where book piracy is completely trivial for most of the books your library is likely to have, a physical copy (even if you have a dedicated e-reader, in my opinion, as someone who has one) is still just nicer in most situations. It's also just easier to discover good books when there are shelves of them – opposed to trawling sites like GoodReads (Amazon-owned btw).
• It's a great space to chill out, especially by yourself.
• If you're ever down on your luck or otherwise just need some service you don't regularly use like printing or faxing, you can go there and do it instead of owning a device you use once a year.