Blockchain is a solution in search of a problem. Conventional technologies can do the same thing with far less overhead. The issue is that they're 'conventional' and not 'new/shiny/sexy'.
New doesn't always mean better, and it's often objectively and demonstrably worse than what preceded it.
I'm not defending blockchain, just pointing out that part of the example wasn't really a good one. Property ownership being something that's already completely public.
I have a public map overlay on my phone that gives me deed information for (AFAIK) every parcel I can see in the USA.
New doesn't always mean better, and it's often objectively and demonstrably worse than what preceded it.