Obviously if the state doesn't enforce the titles they're useless. Sure if the president of a corrupt country decided he wants your house he's gonna get it. But a DLT would prevent lower level corruption that relies on the benefit of the doubt.
If a corrupt official uses their access to change the PDF title of your house to be in his name, he could take that to court to take your house from you. A ledger would prevent that change from happening, or at least leave a permanent record of the change