Question: Bitcoin Ban

I have been trying to get a concrete answer to a question that has been bugging me for a while.

Why can't Bitcoin be banned by central governments if they think it will disrupt their control over the monetary system?

I can see several ways in which the central government can enforce a ban

• Banning banks to deal with exchanges will make it impossible to deposit and withdraw fiat from exchanges
• Using ISP to block all links to Bitcoin on the internet
• Making it illegal to hold bitcoin or run nodes - as they did with gold
• Banning bitcoin mining like China

I feel these issues may be brushed aside when it comes to the discussion of a bitcoin ban by throwing out concepts of game theory, incentives to governments, being left behind etc. These may all be conceptually true but not sure how they work in practice