That's a very minor thing to maintain as compared to the multiple issues that blockchains bring into the mix.
And of course they will need to maintain an IT application: they will need secure wallet implementations, data entry applications to interact with blockchains, security audits for the shitty programs people keep calling "smart contracts" etc.
> Once it is on a blockchain it is conforming to a published standard for NFTs
Ah yes. It automagically conforms to some standard. Just because it's on blockchain.
> Because corrupt government officials have never doctored official records that weren't on the blockchain?
And how is blockchain helping you in this case? Or in the cases I linked: https://news.ycombinator.com/item?id=27212564 and that you even failed to understand.