Of course they get it. They just don't care. If this was opt-in by default, it wouldn't get nearly the same adoption. Lots of people would click no, then never

Of course they get it. They just don't care. If this was opt-in by default, it wouldn't get nearly the same adoption. Lots of people would click no, then never change the setting. The general public will eventually get over it, the same way they got over {the news feed, suggest a friend, changing interests to likes, letting people without .edu accounts sign up, ...}. Facebook knows this. PR probably had the apology written before the feature was turned on.