Even so, GP's assertion stands up: being released on the same day, GPLv3 certainly wasn't written with the knowledge of how personal our phones would become.

The GPL is written with the idea that being able to write and modify software on your own devices is good; our devices becoming more personal only makes GPLv3's additions more critical.

(As others have said, there's ways to make GPLv3 work with the iphone's security model, mainly along the lines of requiring a factory reset whenever you want to add an allowed signing key to the device.)