Nostr veterans help me understand how #nostr is censorship-resistant. Correct me if I get this wrong.

When you post, you are posting to relays, multiple relays perhaps. What is stopping relays from censoring you? To drop any post coming from you?

But then again anybody can run their own relays and anyone connected to that relay will be able to see your post. Hence this is what makes Nostr censorship-resistant, correct?

Technically you don't have to agree to any terms and conditions when you want to participate in the network.

Is my understanding correct?