In some countries it’s fairly common for someone to lose their home because someone bribed the official to change the title records.
If the state, with its monopoly on force, says that you don't own land, what difference does it make if it's a piece of paper, a record in a traditional relational database, or a transaction on the blockchain?
Title ownership of a piece of land is only as good as the enforcement mechanism of that title mechanism. Changing from recorded paper deeds to PDFs in a centralized database made sense (and was backwards compatible). Changing from PDFs in a centralized database to a blockchain doesn't actually change the enforcement mechanism, and makes it less efficient. So what's the point?