What is the difference of a company using an NFT for tracking ownership accross multiple applications, instead of just maintaining it in their database? The NFT

What is the difference of a company using an NFT for tracking ownership accross multiple applications, instead of just maintaining it in their database? The NFT will still have to reference something internal to the company, and the minting costs will make this NFT prohibitive Why wouldn't a company just try to do something like steam marketplace?