So let me ask a question. When you buy a home with all your life savings, does it become yours? What makes it differ from the soviets? I mean, obviously they recorded your rights to the building on paper, and now they record it in digital databases. But is it REALLY that different? You don't truly own either. It's all the government's promise to let you access it and keep away whomever should not access it, until they don't.
The only thing you truly own is bitcoin. The rest are promises.
Freedom is the answer to your question. Communism control the financial freedom of its citizens through setting rules and limits on what you can use which means you will have the same properties even if you work harder than others.
On other type of government such as democracy, people have a freedom to do whatever they like and live on their own in exchange to paying taxes to the government that run the country public services.
I understand your point, most things that we own are controlled one way or another by the government, they can decide that they need the potion of your property for development or whatever and you cannot fight them. They can decide to regulate an industry that you have interest in and you cannot also do anything about it, you have ownership but the government have an overall ownership of everything within their sovereignty.
Bitcoin is different because it is decentralized and that is why many governments were against it until some of them started to see that it is a store of value and now they are gradually accepting it. Bitcoin is truly freedom and privacy for it's holders, as long as it is in a none custodial wallet and you have your seed phrase only you have a total control of it.