Governments will never accept something they cannot fully control. Whether its CBDCs or stablecoins, control is the name of the game. The idea that governments would just adopt existing stablecoins and give up their role in monetary policy is naive. Why would they give that power to private corporations like Tether or Circle? They wont.
Except they absolutely have control over it, what it needs is just proper regulation.
Those stablecoins are unlike any algorithmic delta neutral mantaining stablecoin that are decentralized, these stablecoins are backed by fractional reserves and some of them are t-bill.
To get your stablecoin backed by t-bill you need to abide by law.