So you choose the fingers in the ears, this is not really happening approach. Meanwhile Apple released this a pdf which gets pretty heavily into the cryptography behind things like iMessage, iCloud and Keychain.
...and if you want to use one of the 500 other program repositories for Android? This is when "users trivially elevate programs", mainly because they want free (pirated) stuff, like their friends. I've lost track of the number of people who equate "openness" with the ability to run torrent software on their phone. Google don't give a shit as long as they can serve their ads.