This is true for most digital images, NFT or not... one person usually does own it. In either case, there is no scarcity for observers -- anyone can look at the image as much as they want.

In both cases, people can even copy the image and it use it without the owner's permission, if that's what you're really concerned about losing. But at least the NFT makes it very clear who that owner is, for those who do seek permission or licensing (unlike your average jpeg). For anyone who believes in intellectual property, that seems like a step forward.