Minting an NFT is not simpler than adding a record to a relational database. It's pretty clear that technology itself isn't the roadblock.

And if governments ordering security theatre at airports is relevant to their ability to administer property then I've got bad news for you about the track record of people working on building important stuff on blockchains. Difference is they have no need to be involved in property transactions whatsoever, whereas when it comes to enforcing property rights you're stuck with government being involved anyway.