"Hey, head's up, this doesn't work because you didn't give us permission to {...}, needed because {...}. [Fix this]" would not be the end of the world.

> "Hey, head's up, this doesn't work because you didn't give us permission to {...}, needed because {...}. [Fix this]" would not be the end of the world.

You don't need to convince me, as a software user, but the app developers! And it's hard to blame them. I'm a teacher, and I rail against students who won't read the plain instructions before working on an assignment, but I also see it in myself: when I'm rushing through what I have to do, to get to what I want to do, I can stare right at a block of text and simply not register crucial parts of it. So such a plain instruction seems straightforward, but you'd still get users somehow managing to click it out of the way and then saying it doesn't work, and even one such user is a user that you wouldn't have to deal with if you made the permission opt-out.