I would add that end-users are OK with this because they expect their devices to not be compromised when installing an app. The majority of users are OK with trusted computing and are OK with trusting Google, Apple, Microsoft because it’s easier to trust one of those companies than having to trust each app developer. In the end, you have to trust someone and it’s better if that someone can be held accountable by some legal system.
I agree. I also think though that it's a different kind of trust. They trust Google, Apple, and Microsoft because they _think_ they'll be held accountable by some legal system, but judging by the wrist slaps meted out for their massive security lapses (especially you M$) or their constant breakage of their own privacy policies to spy on people it actually seems worse than trusting individual app developers.