The issue isn't a lack of imagination on the part of skeptics who actually understand the underlying technical mechanisms behind blockchains. It's a lack of understanding by proponents about how the physical world works and how it can and can't be made to relate to digital comstructs.
Imagine that Country A decides to use Blockchain A (which has been around for decades and has proven itself secure) to store its property titles and allow the purchase of property digitally, with full transferal of title and ownership. The government writes a smart contract on that blockchain that facilitates payment, title searches, hooks into other government databases or blockchains for easement information, liens etc. They then, obviously, migrate their existing title information onto the blockchain and distribute the NFT's to the current owners. How do you "register" your fake one?
If you can't see how this could change an old and plodding industry like real estate which is surrounded by mountains of paper-shuffling, then yes, you're being unimaginative.