IMO there are two problems. The first is that no one actually wants to manage that kind of access. Especially not your every day computer user. The second, r

IMO there are two problems. The first is that no one actually wants to manage that kind of access. Especially not your every day computer user. The second, related, problem is that if every app is asking you to review 20 permissions, people are going to stop reading the list and blindly accept. Or at least the people who need the guardrails the most will blindly accept. For all the crazy granular permissions I just don't see a way for it to work other than a source like Apple doing the review, saying that this app is trying to read your documents for no reason and so it's rejected. But now you're back to all apps going through the app store sandbox.