> How came that usually privacy-minded hn crowd
HN has never been a privacy-minded crowd. It's been a collection of random people, and depending on the threads of topic, you'll get more people speaking out than others. See the Dropbox post from 2007. Nary a privacy concern. HN isn't a single voice.
Why do you think it's a privacy-minded crowd? Because you probably react and respond to similar posts, and you see people with a like-mind there.
> How came that usually privacy-minded hn crowd uses run-by-someone-else models so cheerfully and carelessly?
Let's answer this question: they probably aren't doing it carelessly. Consider that Copilot is run by Microsoft, who owns GitHub and your code already. So, they already have the code. I'm not sending them something they don't already have.
Anyways, when I see something I didn't expect to see on HN, my initial thought isn't how it's wrong, but rather, what am I missing? And rather than post an antagonistic question, I instead try to research more to get a better understanding of what I'm missing.