His whole analogy only works because the librarian is a human, and if a human with some apparent authority lets you do something, you can reasonably infer that you have permission to do it. But you can't anthropomorphize a server like that. It's not a gatekeeper, capable of granting permission, just a dumb lock which may be flawed. Only humans can consent.
To repurpose his analogy, if you sneak into the staff room and the librarian doesn't notice and doesn't stop you, you can't use that to say it must have been okay.
