> But Apple customers can be sure of that anyway--just don't sideload apps.
Well, no. At some point they'd need to know what it is to decide if they wanted it or not. At some point they'd encounter an App that isn't in the App store and have to figure out sideloading. We've got a whole heap of people commenting here today who give off a distinct "I want to bypass the App Store" vibe. User hat on, I'd rather they were forced to use it.
I don't think there is enough reflecting here on just how critical a phone is. At the extremes, the US government sometimes targets predator drones based on phone GPS. I suspect an enormous number of phones contain compromising pictures. Phones contain detailed logs of where I am, who I'm talking to, and potentially access to actual records of what was said.
I really don't want to be in a situation where 'Wowfunhappy' is executing arbitrary unknown code on a phone owned by me or my family. I don't want Google and Facebook browsing through and indexing this stuff either. Apple isn't even a good gatekeeper, but they are much better than nothing.