This article misses the very deepest level on which this is all utter nonsense:
An NFT does not actually grant you "ownership" of an image in any meaningful way. The only real way to "own" a digital image is to own the copyright to it, but NFTs do not grant you that. Sometimes, you may have a separate contract of transfer of copyright that you get along with the NFT, but the NFT is not part of that contract. You can sell the NFT on and keep the copyright, if you want.
The only thing you "own" when you buy an NFT is the NFT itself, which is basically nothing but a receipt.
An NFT does not actually grant you "ownership" of an image in any meaningful way. The only real way to "own" a digital image is to own the copyright to it, but NFTs do not grant you that. Sometimes, you may have a separate contract of transfer of copyright that you get along with the NFT, but the NFT is not part of that contract. You can sell the NFT on and keep the copyright, if you want.
The only thing you "own" when you buy an NFT is the NFT itself, which is basically nothing but a receipt.