The notch/pill has nothing to do with marketing. Both on the phone and on the MacBooks, they were a way to maximize the use of the screen by moving some constant elements up out of the content areas. They are needed because there are multiple complex elements in that area that need a clear view of the world around them (cameras, sensors, faceID). So far, they have not been able to move those elements under the display either due to thickness constraints or because the display blocked the light from reaching the cameras and sensors. The Dynamic Island was created to make use of a hardware compromise and that gave a very useful tool for multitasking of time dependent activities. I expect the software feature of DI to persist even if the pill eventually does go away .
The notch on the MacBooks was a clever piece of design. It allowed them to move the whole menubar up and to expand the content area without needing to make the overall case larger. No, that is not just a camera, there are two other sensors and some mounting hardware in a very thin lid. Laptops with cameras down near the keyboard are know as nostril cams for a reason. That perspective is totally unnatural.
I won't pretend that there aren't other design choices that I disagree with (looking at you Mac Settings app), but the notches and Dynamic Island are not among those.