They already have all the USDs they use currently so acquiring BTC wouldn't be a huge problem. And the potential of it growing in value is a benefit not a threat.
CBDC can be controlled from the minting perspective, but is essentially valueless if nobody outside of the circle would pay a dime for it.
Remember this is not individuals beings forced to use whatever the government shoves down their throats. It is countries clearing transactions between each other and they know the tricks, they run the central banks.
