Took me a second, but it's a great analogy for the difference in power.

I would call the difference: A librarian has perspective, intent, and a fierce optimism honed like the edge of a knife through abrasive contact with the world.

A censor sees only wrong thought and choices without any of the qualities of a librarian.

(The Seafood in a bar that mostly serves alcohol is probably not up to code in terms of food safety, the bar might occasionally have live shows and some of the things done at the live show might not be 100% safe, the dishwasher might have taken the job because he is not a legal citizen and the bar owner pays him outside of normal employment contracts...)

But if you see another allegory then it’s a good joke.