This is a silly perspective, inaccurate, and out of bounds framing.

Public libraries, in this instance, is curated data from all the internet, obtained through not legal means (I don't have a problem with this other than lack of attribution, being copy-left). Just to be clear.

But in answer to your incredibly leading and inaccurate framing... they are required (by their job title) to teach to those who who show up in the classroom, it's not their place to discriminate against anyone/thing (even those like itself (other robots)) that also show up in the classroom.

But you can't teach at a university using only knowledge learned from the library. you need a degree. You are free to teach at the park, where anyone can hear you. public in -> public out.

If a professor learns from multiple books, generalizes from them and then shares his knowledge he is providing a valuable service. Versus someone who makes a recording of the professor's lectures and resells them to undercut the professor--that guy is not providing a valuable service.