Yup. You understand NFTs. You are not paying for the product, because once it's minted into an NFT, it's right there in public for anyone to copy; so it can't be used to do things like protect digital art. What you're actually paying for is the ability to say "this person _definitely_ gave me this item". That's still potentially useful in some use cases, like proof-of-ownership of software or tickets, but the way it's being branded as "wow you can own a banksy on the blockchain" is absolute garbage. Somebody actually paid millions of dollars just to be able to say "the artists that burned a banksy gave me this scanned jpeg."