I think that the proper reason why CDs and NFTs are different is that NFTs are non-fungible. You can distinguish an early minted NFT by the wallet of the author

I think that the proper reason why CDs and NFTs are different is that NFTs are non-fungible. You can distinguish an early minted NFT by the wallet of the author of, say, an artwork and a late minted NFT with the same value made by someone else.