You'd have that extra on top plus the bezel to fit the webcam in. I know Dell fit their webcam in a really tiny bezel on the XPS15 but IIRC, the quality isn't the greatest. For Apple, it was probably a matter of utilizing otherwise unused space to fit a webcam in with bigger sensors and stuff. I don't personally mind thicker bezels (I use a ThinkPad T15g, which has bezels from 2010) but for people who care about that stuff, they probably would want it a little bit sleeker and shiz.