Re: "why not try for devotion?"
And here, ladies and gentlemen, is devotion. The willingness to honestly and earnestly believe that trust doesn't matter. The ability to convince one's self that anything which gets in the way of belief is simply irrelevant.
Witness it in it's glory. Simply believing that such a thing as an "acceptable privacy cost" exists is the first step. But to sidestep issues of trust around end user control over their own devices, applications and operating systems as irrelevant? That's devotion.