It seems like the person you're responding to is raising a legitimate criticism of NFTs, or at least, criticism of the touted benefits of them: an NFT provides absolutely no value to its owner unless there's some kind of enforcement of the "property" rights it suggests. If I own an NFT of a JPEG, there's nothing to stop anyone else from simply right-click-downloading that JPEG and hosting it somewhere else. At that point, my NFT is just me shouting "dibs!" to a room full of people who don't care.