Because in a fair fight, these centralized parodies of cryptocurrencies will never win. The authorities have leverage and they will not compete with any competing product in a fair fight, trying to win at the expense of quality and service. These will be bans, destruction of infrastructure, or even the introduction of any penalties for the use of cryptocurrencies. This is the only way the state and banks can impose their dubious products. The state and banks are not interested in freedom of choice and competition, only total control and regulation of the space in which its products are presented.