Background: Obviously, buying an iPhone has its advantages - lots of apps, a closed source operating system, etc. Also, unlike an Android user, it seems like an iPhone user can be reasonably assured that they will actually receive fixes for newly discovered bugs, since the the OS and the hardware are made by the same manufacturer.
But what are some security/privacy related reasons why someone would buy a smartphone from a different manufacturer instead of an iPhone?
Threat model: let's say specified attacks from hackers rather than generalized data collection or spamming, etc