Earlier quoted context omitted.
There are not legitimate security reasons for Webkit only. That makes zero sense. Chrome has hands down beat every other browser on security for years. Go read the CVEs. There is absolutely zero reason to believe that iOS webkit has a better track record than webkit at large. Therefore it's nearly certain your iOS device is less secure browsing the net with webkit/Safari than if Apple allowed real chrome to run there…
You misunderstand. Apple can fix WebKit bugs, but they can't force Google to fix Chrome bugs. Also for Apple to allow v8, they would have to permit 3rd party unsigned executable code (JITed in this case). Apple doesn't want to allow that. This is not about CVEs, it's a meta discussion of not outsourcing the security of the platform.
> Apple doesn't want to allow that.
Yes, that's all it's about. Apple's control. Other excuses people make up for their reasons are demonstrably false.