If you trust a central authority such as the government, then blockchain doesn't solve a problem you have. That doesn't change the fact that many people don't

If you trust a central authority such as the government, then blockchain doesn't solve a problem you have. That doesn't change the fact that many people don't trust the central authorities, often because their situation differs from yours such that it is not rational for them to trust the central authorities. In some cases blockchain solves their problems. Blockchain solves real problems. They just aren't problems you (or most people on HN) have.