I am Leonardo da Vinci. My wallet is ABC. Would you like to buy the Mona Lisa?
I am NYC. My wallet is CBA. Would you like to buy the Brooklyn Bridge?
The notion that a wallet is authoritative is not grounded in reality. There is no central authority. There is no registry. There is no legal correlation.
And your Octopus NFT isn't an Octopus NFT, it's an NFT with a pointer to a reference that points to an octopus. Great, now I just minted an Octopus NFT with a pointer to a reference that points to the same octopus. Now what?
But you're claiming that we need to backtrace each NFT to some wallet which somehow (even though there is no authority, by design) I guess we'll find a MySpace posting by Mark Cuban saying it was his NFT. It borders on parody.
Could Valve "mint" guns through a blockchain? Sure, they could. There is another game (an F1 game) where they do something similar for tradeables. But that is neither here nor there with the reality that NFTs as currently implemented are effectively equivalent to selling certificates offering people a plot of land on Jupiter.