It depends expensive data centers, engineers and whole legal enforcement involving judges, lawyers, prosecutors, overseer, agents and jails to make public servants not corrupted. Even hiring one human are much more expensive than blockchain. Governments and banks research blockchain to reduce all these expenditure. Blockchain data can be updated with old data permanent at the same time, not a problem at all.
I honestly think you're not informed enough on this topic. What you are criticizing are mostly solved now. Gov and big banks are adopting blockchain opposite to your point.
The real purpose of this process isn't filtering out brilliant programmers but who are more obedience.
Managers aren't some kind of stale guy but predators who sucks slaves' blood. They actually know what they're doing, they're sending a powerful messages that they have power to order subordinate dumb things, like memorising riddles.
Database is heavily designed system, not a kind of data structure as blockchain does, so database is the one that's overkilled in this case.
Centralization and decentralization is not black and white, there's a spectrum between them. Permissioned blockchain can have enormous nodes, such as 10000 nodes, involved to achive consensus.
How do you make database permanent and achieve consensus between enormous users? You may end up with a data structure called blockchain and consensus protocol in that database with extra layers and barriers.
Make decision by considering blockchain as data structure of distributed resilient auto-clearing accounting system. I don't think learning that would make you more "technologist" if such system doesn't serve you any purpose, cryptography and data structure rather make one "technologist" in general.
Blockchain is not inherently decentralized. Decentralized consensus protocol is what makes Bitcoin decentralized and ineffective, Nothing to do with blockchain. Governments and big banks generally use blockchain with more centralized permissioned consensus for their infrastructures.
Current Internet "works" in a very complicated way, ISPs and apps handle all the hassles, wire and wireless infrastructures, effective routing, certificate authority, encryption, permission control.
Clients who won't notice until they want to form a network at wild themself. In addition, average app developers are error prone at cryptography which are potential security holes.
Yggdrasil deals all of them as an all in one solution. Ad-hoc WiFi is enough to form a network. IP address is username, routing address and public key. App built on Yggdrasil is also freed from dealing with encryption and permission control.
Yggdrasil doesn't need Internet but existing IPv6/IPv4. Ad-hoc Wifi or local router with multicast support is enough for Yggdrasil to run automatically.
I honestly think you're not informed enough on this topic. What you are criticizing are mostly solved now. Gov and big banks are adopting blockchain opposite to your point.