I’ve seen titles like “Why top scientists are leaving the United States” where the article itself talked about A SINGLE RESEARCHER relocating to France.

If you're talking about the article featured on HN just day(s) ago, that was about a funding effort to get more researchers to move to France from the US, while they interviewed one specific individual. I think maybe you skipped the contents of that article (as it was in French) and instead just read the HN comments which misunderstood the article :)