Why is the idea of a state run bank disturbing ? Would like to see a state run bank with digital sovereign currency proposed here in California to help fund t

Why is the idea of a state run bank disturbing ? Would like to see a state run bank with digital sovereign currency proposed here in California to help fund the commons and to provide consumers with checking accounts devoid of parasitic fee's like overdraft, monthly maintenance, ATM, etc( maybe credit unions are close enough).