Maybe Apple knew those who disagreed with the tradeoff would almost certainly get a third-party app like this, and so worrying about them is unimportant because

Maybe Apple knew those who disagreed with the tradeoff would almost certainly get a third-party app like this, and so worrying about them is unimportant because then there are options for both - it's just that that anti-notch group might not like the default. More options are better than fewer.