Earlier quoted context omitted.
All NFTs contain a public URL inside them, as the thing the sellable token points at. You can go look at other peoples NFTs all you like, at any time.. they can’t stop you. NFTs aren’t contracts for the rights, so this is as real an NFT as any other. An NFT is essentially a text file, that only one person can prove they own via the blockchain, where the file has a URL written inside. Nothing more, nothing less.
I'm wondering, what entity enforces a uniqueness constraint on the URLs? Presumably it wouldn't be hard to copy the content & host & create a whole new URL, but what prevents you from just minting using the original URL?
There’s no uniqueness enforcement on the URL as far as I know. It’s the provenence of the NFT that makes it valuable.