If gameplay is also mediated through WotC's servers, though, then the cards would lose any intrinsic value when/if WotC goes under or stops supporting the game.
And if others are allowed to create their own servers so that the game can live outside of WotC's auspices, that would also undermine the value of the NFT cards, since anyone who is able to create their own implementation of the game could just as easily start creating non-NFT versions of the cards that people can use.
And if others are allowed to create their own servers so that the game can live outside of WotC's auspices, that would also undermine the value of the NFT cards, since anyone who is able to create their own implementation of the game could just as easily start creating non-NFT versions of the cards that people can use.