However, I would not think many people use an iPhone to be secure. I am not sure whether many of the users are aware of that property of an iPhone. As for Camera, it had been the best one before. However, of late camera performance has not remained an exclusive highlight of iOS anymore. There have been several advancements and better cameras. Oppo and Vivo can be a couple of good examples. Samsung too has already snatched the best camera trophy from Apple.
Live....and Let Live!
iPhone generally draw the attention as 'the top' one, so many would like to grab it.
Now coming back to iPhone device performances (not all but stating few), in fact, no other brand can chase its touch-integrated feature and security level at the moment. It has its own iOS whereas other brand devices all are depending on other's OS.
iPhone Camera may be lesser MP at the moment compare to the other brand but try to take the picture or video from the latest or oldest iPhone and upload them in a system and check it, now do the same from other brands' higher MP photos and videos upload them in a system, check and compare between them. You will feel and realize which one is really better.