[raxxorraxor]

While true, that is the same reasoning when people said that it isn't censorship if government isn't one actor involved or it isn't censorship if you just de-platform people.

It fails to grasp the core issue, where some people have the ambition to act as a barrier to information. The implementation is secondary. You are correct that a school library is a very poor case or an invalid one of course. The general tendency for more censorship is probably real though. I wouldn't expect a Guardian article if the books were associated with different political leaning though.