Yes, I mentioned that. And I think it would be great if GitHub added some sort of scan to see if it was accidentally returning some verbatim code and gave a link to the repo it came from, but the situation with Google was much more clearly harmful: by scraping and presenting verbatim quotes, they are directly siphoning web traffic away from the sites they scrape from, and many of those sites make money based on page views. That is direct economic harm, and the actual impact was significant for many companies, not merely theoretical.

With open source code, the harm is much less tangible, since negligibly few open source projects make money from people going to their GitHub pages because they're searching for code snippets (not zero, but almost). My guess is that an honest quantification would put the lost revenue due to Copilot's existence in the tens to maaaaaybe hundreds of dollars. Courts look at that type of thing, which is why I don't think this will end up being an issue, at least in the US. Europe is wild, who knows what they'll do there, and that's where activists on this topic should most wisely apply pressure, you can always convince someone in government there to throw a spear at a BigCo. You won't take them down, but you may get them to negotiate, and I don't even necessarily think that's a bad thing.

That said, even in the US, if enough people make noise then things could change, so I encourage you to speak to your congressperson (I will be as well, but arguing the other side, because I really do think this is fair use and I'd like to see it enshrined as such explicitly, because this fight is going to be extremely common over the next few decades).