Preauthorization is a bit different, and yes I can see care providers hating it.

Its possible for a provider to know ahead of time that providing a saline IV costs $60, for example. Its also possible to have health care policies that approve any treatment deemed necessary at any healthcare provider, or at any healthcare provider in network if that concept was still a thing.

We don't have to have a preauthorisation step where doctors are expected to ask insurance companies if they will approve a certain treatment for a certain patient before it can be done. That is a particularly terrible implementation if you ask me.