> I don't understand your logic unless you're implicitly saying the camera needs to go away
Yup. We never had camera before the notch.
> The notch makes for a smaller menu bar but without the notch there would be no menu bar there
Yup. Before the notch we neither had a menu bar that could comfortably fit most menu items even in professional apps, nor did we have a camera.
BTW, you literally are saying "The notch makes for a smaller menu bar". Imagine if I wrote that as the first sentence in my comment, then there would be no misunderstanding
