If you live in the US and notice that bank transfers are significantly cheaper and faster in the UK or EU, you cannot just set up a UK bank account in your town. You are forced into the American “bank protocol.”
In crypto, you can withdraw your funds from one entity auch as MetaMask and deposit it into another such as Argent, Gnosis or zkSync, because all of the tokens and applications are composable with each other and build on the same protocol.