Comment by Apocryphon

Precisely, and it's quite ironic given Steve Jobs' original envisioning iOS as chiefly relying on web apps. The App Store mandate of banning non-WebKit browsers is entirely technical in nature and self-serving; to prevent apps from including third-party JIT compilers[0], and maybe (like Flash was) other browser engines are viewed as unoptimized and insecure for the platform. It's doubtful that Apple actually cares about preventing Chrome's takeover of the web. This is not the guardian you are looking for.

[0] iOS Application Security: The Definitive Guide for Hackers and Developers by David Thiel, pg. 8-9

"Jailed Just-in-Time Compilation on iOS" by Saagar Jha https://news.ycombinator.com/item?id=22401146