Why you can't just screenshot an NFT

Everyone talks about saving a copy of the NFT when really its a clone. Part of what makes a physical painting valuable is that its usually the only one in existence. Sure someone can make prints or copies in some way of the painting and sell that for a fraction of the price of the original, but there's still only one original. With NFT's you can right click and save image as and get a CLONE of that image. Its exactly the same, every pixel is identical regardless of what the ledger says. When you own an NFT you dont have the only one in existence, you just get a certificate that claims you do when really everyone else on the planet has the identical image and got it for free. You're over paying for nothing unique, the law of supply and demand goes out the window.