You can't resell a game in steam because Valve doesn't let you, not because the game is being made artificially scarce.
Which it is, but this is not the reason you can't resell it.
The point is that reselling an NFT doesn't require a central ledger. The central ledger is necessary to prevent the same token from being sold multiple times by the same seller. In other words, to create the illusion that the seller doesn't have something (and therefore can't sell it) when in fact they actually have it.
Each NFT is separate. You can authenticate a digital game by owning the nft. The publisher can sell as many tokens as they wish, that's entirely different. The point is that they can't stop you from reselling, because it's on the blockchain, not on steam.
It cant be artifial scarcity when there is endless supply.