How do you prove someone in the central government didn’t take a bribe and tamper with the records? What if you’re from a country where the central government is less than stable? How would you prove ownership if something were to happen to that database? How do you prove that someone is who they say they are? How do citizens and businesses access that database? Is there a standardized format for it? Does it use some proprietary software built by the lowest bidder?
Not saying that blockchain has all the answers or that it is the right tool in all cases, but these are some of the problems it is trying to solve.
People who say PHP is shit haven’t really used it and are just repeating the memes. It’s a perfectly fine language and there are a number of excellent tools and frameworks for it. It’s reputation is a result of it’s easy entry and widespread use. A whole lot of people who knew just enough to be dangerous made a whole lot of stuff, and it ended up causing a whole lot of problems. But for some reason devs shit on the language instead of shitting on the devs who put them in a mess.