If governments could ban Bitcoin they would have done it a long time ago as they want now. They don't really want to ban bitcoin, but rather want to regulate.

If you mean the ban imposed by the government of India and the regulations starting to re-enforce “Cryptocurrency and Legal Digital Currency Bill Regulations 2021”. So what exactly do they want to ban cryptocurrencies and create regulations. The answer is I think "Project self launch digital eye" and most countries prohibit and make regulations just for this purpose. If you look further, almost all countries don't really ban cryptocurrencies, they just want to regulate and control them like fiat.