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.
The stablecoins especially libra could actually gain alot of popularity, only that they are backed by fiat currencies which are dangerously centralized. Am a bit comfortable with decentralized stablecoins that aren't entirely backed by fiat.
Hopefully we will have "stablecoin" backed by things like food(nutrients rich food) with long-shelf life. Food prices are usually stable.