The whole idea of web3 is that identity is intertwined with all of this. NFTs will be enforceable because all web3 services will use the blockchain as the main

The whole idea of web3 is that identity is intertwined with all of this. NFTs will be enforceable because all web3 services will use the blockchain as the main arbiter of truth in the digital world. E.g. if you built an NFT based card game, no platform (game application, deck-building site, forum, etc.) would recognize your "fake" NFT as real. You could build an nft based ticketing platform. The ticket issuer issues NFT tickets on the blockchain, all the infrastructure for trading NFTs is in place (you could literally trade concert tickets on OpenSea). There's no "forking" this NFT because the concert venue would only accept the ones they issue. You then show up to the concert venue with your phone, sign a message proving ownership of the ticket, and walk right in. This process eliminates all exploitative middlemen like ticketmaster because all the mechanisms for ticket distribution and selling have been built on web3 already.