I think what really the issue in here is that people and government are afraid of what really will happen in the economy imagine facebook for example has almost the data or information of every human being who signup with facebook, then libra ofcourse will then be integrate to facebook, since they all has the data required , so this makes facebook and libra makes bigger than the government having the information, on the otherhand people and the government are afraid facebook might use it against the people same with the government and takes control of everything well thats my opinion everyone is free to share their thoughts I hope we hear the others
I am not sure that data is really of their main concern, and i believe their main concern is that part where they would not want anything that would make Facebook bigger than them and this has to do with financial control, and the power of government lies more in the financial system of the country, that is the main control and power that they have over there citizens.
If they really allow Facebook, Facebook would indirectly build a nation and this might be called Facebook city, i am sure that Facebook still has that vision of building a nation because right now, they have the largest user database, and once they have control of cryptocurrency, they are indirectly in control, i am not also in support of the Facebook coin.