Yeah the point of government services like a central bank or a public healthcare option or what have you is that they provide a floor of "this is the worst service/bargain you can possibly get", and then the private sector needs to compete against it (sometimes by dishonestly implying they have a better product when their product is worse, but that's its own can of worms).
For basic necessities to modern life, there needs to be a state provided minimum quantity of access, so that you can't be screwed over by corporations just deciding you aren't profitable enough, or cornering the market and price gouging, etc.
I think the state ought to fund such minimum services, but should under no circumstances be permitted to provide them directly. Quality has a hard time competing with free, especially for the poor. If you can only afford the government free solution and they wrong you, your options for seeking redress will be much more limited than if the government gave you a voucher for a privately provided service.
For basic necessities to modern life, there needs to be a state provided minimum quantity of access, so that you can't be screwed over by corporations just deciding you aren't profitable enough, or cornering the market and price gouging, etc.