This is exactly why stablecoins like USDT, TUSD, DAI, Libra, etc. won't gain much popularity. Cryptocurrencies and the blockchain technology were created with a scope - that we get rid of all the centralization and excessive control of authorities over the world. Corruption is at all time high level and transparency is nowhere near where we would like it to be. By adopting Bitcoin and blockchain & adiacent tech like smart contracts I'm sure we will make a much efficient & fair world.
Stable coins will gain more popularity as it is the resting place of traders in time of Bitcoin downturn.
Decentralization of cryptocurrency is not complet without the centralization of some part.
We should always consider the native system that was already in place before the advent of cryptocurrency.
To have a fair financial system, I still believe that the harmonization of the native system and blockchain Technology will help in achieving it.