There’s a couple of responses already, but I think they miss the main point: when the Apple reviewer goes out and does this, they don’t mark your app for “unrestricted web access” (which is the category third party browsers go in, and immediately makes them rated 17+). That would actually make sense, even if you consider it “unfair” because Apple’s own apps of course don’t get those ratings.

No, the problem is that when a reviewer finds anything “questionable” in your app, they mark it as a porno app. Pornographic apps cannot be in the App Store. That rule is designed to keep PornHub off the store (again, putting the morality of this aside…) and yet Apple equates your app with them even if 99% of your content is squeaky clean. The reviewers specifically seek out content that they want to flag, and the problem is that they then reject it by representing it as if they just stumbled upon it by accident, or that it’s so prevalent that it’s obviously the purpose of your app. So now you’re stuck arguing that your app is not a portal for porn in these absurd cases where the reviewer has, through their misunderstanding of the rule, changed the argument from “is your app primarily focused around the consumption of pornography” to “does your app make nudity available to a determined user”?