What is the single best argument for getting an iPhone instead of an Android?

There is no argument, just get an iPhone. I am kidding, there are few points which  makes iPhone to outsmart Android Phones according to me,

1. As everyone knows, iOS is more user friendly than Android. Very easy to user, anyone can use it without any trouble.
2. Off-course security is important, iOS is pretty closed operating system, and app's have to go through proper auditing process before hit the app store. In my opinion Android doesn't care much about the security.
3. One major difference that I always notice is about the quality of app's  in the Apple Store and Google Playstore. Clearly iOS app's are more eye catching, stable, easy to use than Android app's and do not crash more often. I have seen so many non  functional, buggy and ugly android app's in the Google Playstore than may be few in the Apple store.
4. I feel the last point which actually makes iPhone ahead of Android phone's is the feel, there is human touch to the device, and  you really feel happy when you use your iPhone, unless you are really strong Apple hater.

Before I hit on submit button, there is one point which is in favor of Android that I don't wan to miss, Android phone's got so many additional functionalities for users, I am sure iOS would take a while to get in there