You are right on the latter point, a keypair itself is a pretty good method to verify pseudonymous identity. However, we are talking about NFTs as tickets. Tra

You are right on the latter point, a keypair itself is a pretty good method to verify pseudonymous identity. However, we are talking about NFTs as tickets. Traditional ticketing relies on secrecy, or in other words possession of ticked-id grants entry. Data embedded in NFTs is (and has to be) public, therefore token auth model does not work, you must use challenge-response model. The very point here is that ticket data has to be linked with a keypair and provided at the moment of sale to be verified upon entry. Public key must be provided at moment of sale, blockchains are one way to store that link, private database of ticketing system is another. Blockchains bring their own disadvantages and the only advantage is trustless transfer. In what scenario trustless pseudonymous transfer of a ticket is an advantage worth disadvantages of the blockchain.