I think that you are misled. They will be launching their own USDT, not Bitcoin. And they have quite a good chance for success. People would trust easier a government than a problematic company. And the central banks can easily charge some fees that used to go into VISA/Mastercard pockets. And obviously they'll also gain the control they are longing for.
In my opinion, CBDC is not USDT or a coin similar to USDT, for example is the digital dollar which the US are working on, another is the digital yuan which China is working on. The cryptocurrencies will surely be successful because it is the governments that are working on it, citizens always mostly have trust on the governments.