I am not a proponent of any of these bans, but it seems like someone needs to decide which books are featured at schools, and these 'bans' are just vetoes of certain books enacted by parents or school boards. I am not sure why a librarian or some school administrator should have complete authority to select any books they may prefer. This seems similar to a curriculum, in that the citizens and/or school board direct the educators what they should be (and should not be) teaching.
> I am not sure why a librarian or some school administrator should have complete authority to select any books they may prefer.
Because it's their explicit job function. Librarians aren't hired to watch over unchanging collections of books like cryptkeepers. They have budgets to buy books with.
