E-banking works fine in China, the e-CNY (China's digital currency) is still undergoing trial and development for over one year, and other forms of virtual or internet stuffs that the government can supervise and control are accepted in China, but it has to be the mining of the virtual currency that they don't control that gets banned. China themselves never said anything along the lines of what you are saying when they banned BTC mining, they made mention of 'enviromental safety' and 'money laundering' issues, both of which are lies too.
The government of any country will never say the deep reason, including the United States. I'm just guessing.
In fact, e-CNY is not a cryptocurrency, it is a digital form equivalent to legal currency.
Not all virtual economies are unacceptable. Like e-commerce, e-banking, to some extent it's to help the real economy, and it can be fully regulated.
I don't know much about money laundering with bitcoin, but I think it does make it easier to send money around the world. Capital outflows may be a matter of great importance to governments around the world.
There is a special economic entity in China, the state-owned economy. Many famous college students use the computing resources of state-funded computer labs, and that money should not be used for mining. In fact, anyone with the right can do it. They just use state money for their own profit.
Many views are not absolute, it depends on our government, so what I think is really just for reference.
But the Yuan in itself is affected by inflation

. Financial openess and freedom should be supported by any government that is not
hungry to control the lives of her people. Nobody is forced to speculate with Bitcoin, it is an individual choice a person takes knowing the risks involved, BTC isn't only a speculative asset too but has more things it can be used for, it is also a source of income for miners.
Indeed, Bitcoin is not affected by inflation, because its supply and demand are always difficult to balance, and the price fluctuates too much.
Perhaps in the world's No. 1 country, financial openness and freedom can be chanted. But this is not possible in all countries. As you can imagine, if this was not an absolute advantage for the United States, it would not advocate it as such.
Of course, it can increase revenue for miners, which is not speculative, if miners choose to join the mining pool.
Not everyone understands the risks involved in Bitcoin, but everyone has a dream of making a fortune.
There are some ordinary families around me who went bankrupt because of virtual currency transactions. They do blame themselves, of course, but financial regulators believe they have a right not to make extremely risky investments available to ordinary people.
China or any other country can ban BTC mining, regulate miners, ban local banks from supporting BTC transaction, but they can't ban BTC or control the network or its hash rate, it is decentralized and collectively run.
Yep, that's why I login the bitcointalk.

Because I believe that Bitcoin will change for the better with or without China's participation.