A wide variety of books can keep the humdrum and mundane of everyday life from elbowing out the truly glorious and fertile growth possibilities that are so much larger than what is offered to children at home or in the standard curricula of K-12 education.
Gifting a book is an expression of care.
Really, the only defensible goal of learning to read in school is not to increase yearly test scores, but to help children become eager, daily readers of self-selected books.
Old books, songs and other media with racist content can be crucial conversation starters and catalysts for societal change.
Libraries and other cultural institutions offer a wide variety of learning materials–not just books.