Hell, photographers know that any iPhone can't compete a midrange camera.
But Apple clearly wants the average person to believe that it can. Why else stick a "pro" description to your phone's camera? Of course they can't spell it clearly, because they will become a laughing stock. But they do imply it at every opportunity: "Pro camera system. We’ve three‑upped ourselves.", review by professional photographer etc.
It would be fair game if they had a professional instagrammer review the new iPhone. Because that's the only kind of "professional" camerawork you can do with any phone.
Why would they? That's not who they're competing against.