Agreed that measuring screen size diagonally with rounded corners and missing areas don’t make sence(really diagonally measurements stopped making sense when screen ratios were no longer standard) screen size should just be total screen area. But a notch or Dynamic Island has both, screen symmetry and border symmetry(at least left/right). The top row design might have inner screen symmetry (so did the iPhone 8 and previous iPhones) but looks bad. I know that comes down to personal preference, but all those cheap Android phones(and even some very expensive Samsungs) had each border a different size and looked like crap.I think Apple clearly cheated when they went from the 8 design to the X. Eliminating the bottom button and heel along with the fat top area that were unused (remember, way back when we had truly rectangular screens with sharp screen corners?). Notch, bubble, whatever....they eat into the usable area. Radii cheat the true screen size. Is it a "theoretical" sharp corner or true diagonal? If they measured X and Y (to the bottom of the dynamic island) I think people would be disappointed in the screen size.
The thin top row with the earpiece, camera, and coner stats in as think an area as possible is 100% better than the dumb island eating up space so far from the top.
Also, I think screen symmety is way more important than border symmetry.
i personally would ditch a front facing camera completely for all screen with rounded corners and no notch/island, but couldn’t image have to go bad to Touch ID. Maybe some form of Apple Watch security for those that don't want Touch ID. But Face ID works so much better in most situation.