I feel like most of these changes are there only because troubled parents feel like they're powerless to control their children.
I just mean we should be careful and work in an evidence-based way rather than a moral panic-based way or a "I turned out fine"-based way (this latter, a common defense worldwide of child beating for instance)
Since you can't prove a negative, e.g. profanity isn't harmful to children, the question here is can you prove profanity harms children. Yes anecdotes aren't evidence, but what can be asserted without evidence (profanity is harmful) can be dismissed without evidence.
Circumventing child controls was part of my childhood. I couldn't play runescape until I was "13" but I sure got around that one. Was that bad for me? Seems extremely unlikely.
I agree with the parent comment that this is a pathetic attempt at adults trying every last measure to feel some sort of control over their children.