it's kind of a lie. The blockchains are huge and slow. So all it means is that you have a public/private key. You end up sending and receiving money by signin

it's kind of a lie. The blockchains are huge and slow. So all it means is that you have a public/private key. You end up sending and receiving money by signing stuff you don't really verify, and trust some other 3rd party website for any chain verification. So you have a private/public key, and the rest is website. You don't really do anything on the chain by yourself