So "wiping" an iOS device doesn't actually wipe an iOS device? Really Apple? How is software reviewed at that company? How does this get sign-off? What the hell

So "wiping" an iOS device doesn't actually wipe an iOS device? Really Apple? How is software reviewed at that company? How does this get sign-off? What the hell is happening? Though it may appear to be seemingly unrelated, this is why I don't use iCloud. I don't like the "it just works" black magic shit and you as a user don't really understand what's going on and have extreme crude and coarse-grained controls for managing it.