You still have to open Xcode (to get the certs), and you still have to accept the Xcode EULA. Title is quite misleading if not outright false.

As someone who tried my very best to not open Xcode for building and shipping Mac and iOS apps, I agree, there are things there are literally no way around opening the GUI, not even terminal utilities for. You cannot do this 100% headless, which is what I attempted at first.