the "why bother, I have nothing to hide" territory.

I literally explained why it isn't. "Why bother I have nothing to hide" is a slippery slope argument and a slippery slope works both ways.

So if not changing your username every time, then when? What is the defining factor deciding that, and why?

I'm not saying privacy isn't important. I'm saying that privacy is important, and should be available to people, but that personally I have absolutely nothing to fear. I understand living in a shitty country like the US or Russia or China, and having to lie about one's thoughts and allegiances. But I don't have to.

This isn't the same as saying that privacy shouldn't exist. Just because I'm ideologically a nudist doesn't mean I walk around naked in any given shopping centre, as an analogy. I realise the usefulness of clothes, especially in the winter at this latitude.

No, the meaning of both sentences is completely wrong

No it isn't. The first one is wrong. But see how you say "completely" there as an adjective? Incorrect. It's not completely wrong by a mile.

If this was a language test at a school, you'd give them point for that, because it does render context. As in you can spot that one is using a dialect on purpose. You thought AI doesn't do dialects. Ofc it does. You just need to confuse it's context, like I did, and it's easiest done with the SW dialect that shortens and twists words, the easter and Northern dialects which just add vowels basically are not cryptic enough for AI. And you're just pissed because I did it better