I have my problems with NFTs, sure, but this argument is dumb.
You didn't actually get a dollar, you got a piece of fabric/plastic that points to a dollar.
Who the hell cares? If everyone agrees that your paper bill or NFT represents something, then it represents something.
If the server hosting the image goes down, guess what? You still have the thing you bought. If you go to the Wayback Machine or whatever, you can still find the picture. That's ignoring the fact that it's possible to create NFTs that don't rely on an external server at all.
That's a fair sight better than most other digital assets.
🤤