Although I generally dislike App Store model, I'd say this is a fair ban in the context of Apple's rules. They'd outlawed that functionality, so they removed the app when they tried to sneak it back in. This is perfectly logical.
However, if users want the functionality enough to bother going to secret URL to enable it, perhaps the rule is a bad one. Users clearly want something as simple as using a physical button to take a picture, but Apple won't let them because it violates their guidelines. On one hand, this means apps are consistent and follow Apple rules, but on the other hand, it means you simply cannot have a ridiculously simple feature simply because Apple says so. Would you rather have consistency or freedom?
I agree - the fact that you have to actively unlock this feature should mean that you are aware what you are doing and thus, the risk of confusion is not an issue.
However, if users want the functionality enough to bother going to secret URL to enable it, perhaps the rule is a bad one. Users clearly want something as simple as using a physical button to take a picture, but Apple won't let them because it violates their guidelines. On one hand, this means apps are consistent and follow Apple rules, but on the other hand, it means you simply cannot have a ridiculously simple feature simply because Apple says so. Would you rather have consistency or freedom?