None of those seem to require a blockchain at all; a trusted authority database would accomplish the same thing at a fraction of the cost and complexity.
The point is you don't need a central authority. And I'm sure running a central authority costs some too which could also gain power that no one in the industry can resist.
Yes, that's the point: pay lots of money and make your system incredibly complicated, in exchange for not having a central authority when you literally already have one you could just use, for a worse and less-maintainable version of the same technical result.