So what exactly should be decentralized?
~snip~
Government should be decentralized so that people can see the funds movement from it transparently without the need of media coverage(which is often filtered).
The blockchain might be adopted in such places where it is possible to minimize the price of datastorage (like there was a project that kept medical data on blockchain) but this is not about privacy.
Blockchain can be adopted on places that needs faster sending of data and also faster and transparent recording of transactions via ledger(NASA, etc.) I think blockchain can also be adopted on industries that deals with money remittance and handling(such as banks and money remittance centers since people trust them more than cryptos).