I guess you're not getting it. And in the image you posted, it looks like the curve on the left and right of the bottom bezel isn't even the same curvature as the top left and right. This implies obvious problems. This is no longer a device without a top and bottom: it has a defined top and bottom. Apple pioneered the smartphone without top and bottom with design and accelerometers.
The only solution to this is either of the following:
- Embed the camera and sensors in the screen using translucent components; or
- Miniaturize the components to such a degree as to fit them in the thin black bezel that frames the iPhone X.
Either of the above will eliminate any notch or asymmetrical design; either will eliminate a defined "top" and/or "bottom" of a smartphone; either will create a perfectly seamless and symmetrical design without the loss of functionality (e.g., front-facing camera, FACE ID, etc.).
There is no other solution.