There is a thing called phone tag that many people would like to avoid. It's common when dealing with businesses that aren't going to be coming from previously known numbers. Especially annoying if you have to call someone back but can't call directly and must go through a transfer/wait.
I know, I know... you could just advise all GrapheneOS users to just not interact with the world, lest they bend to your will.
@ConflagratedK9, like so many OP's, did not ask to be debated on the merits of Call Screening assistant apps.