Bringing up opera singers breaking glass as an example of sound vibrations physically hurting people is just not useful in a conversation about freedom of speech because it’s a nitpicky convoluted example that is not a great thing to bring up when you’re trying to redefine the claim so that you could rebut it. (Note that I am specifically talking about the example you brought to to support your interpretation of the claim. I’m fine with your speculation that the claim literally meant something along the lines of “sticks and stones can break my bones” rather than “free speech has never had adverse consequences”. It just didn’t need your qualification. I do appreciate the self-reflection, though.)