I could certainly see the value of each community library having some space allocated to different "specialty" sections. That would make for a pretty rich loan inventory.
I've also been to many libraries that just feel like dumps and are not using space well. They have masses of cookbooks or old magazines that they call a special collection. There's a fetish surrounding "the book".
In the end this guy is arbitrarily deciding which books have value and which don't, which should ring an alarm bell for us. We might agree with what he saved, but we also don't know what he didn't feel was worth saving. That's why as systemic approach is so important.