If you were to get the new Land Registry enforced you would have to change the law, in which case the blockchain is no longer needed since the idea and enforcement of ownership is centralised with the government.
Your wording here makes it seem like you confuse the NFT (the pointer to the content) with the content itself.
If your property is an authentic piece of fine art, it can be copied/forged. An NFT doesn't prevent unauthorized copying; it only asserts ownership of the official copy, similar to a receipt of the transaction (which must be publicly and immutably stored and displayed in public).
The "NFT" is not the property itself, hence copying is not of the NFT itself; it is a notary's public assertion that a transaction of the asserted property (URL) happened.
I agree that NFTs don't solve the issues you raise in your second sentence.