It is also my understanding that NFT need a central authority defining which chain is the true one to work. This is true for all NFT use-case I think, event tic

It is also my understanding that NFT need a central authority defining which chain is the true one to work. This is true for all NFT use-case I think, event tickets, membership, game assets... This can be fine and still interesting for these use-cases, for example several independent organizations can agree about the validity of a token independently. Personally I don't think NFT for art make sense though.