Though amusing, I feel it's worth noting this image had to go back over a decade—eleven years—to find an iPhone without a camera bump of some kind, and would have to go back 6 years to get a pro-level camera without a plateau of some kind.
I agree that a dual measurement should be included, body thickness and camera plateau, but it never has been, so here we are.
And to give credit where it's due, I have no desire to own an iPhone Air, but it IS a bit of astonishing engineering. They've used the plateau to provide a place for the logic board, and turned basically the entire body into a battery to preserve decent battery life. Love 'em or hate 'em, Apple has a world-class engineering team.