Are you saying you reject the use of "we" for any group that doesn't include you?

I'd assume most French would be happy with "France detected Lightning on Mars"

I read the title as equivalent to "Humanity detected Lightning on Mars", which I'm also perfectly happy with

Right? It wasn’t me. So was it Gizmodo, the website where this was posted?

I assume you're downvoted for pedantry (understandable) but it is a real pattern. Whenever it's a space topic it's always "we" or "Japan" or "America". Nobody is so vague on other topics. I suspect it's a throwback to the Cold War space race when the major players did flights in a geopolitical context. If the institute's name is very long, like here, maybe "Scientists detected ..." or "Researchers ..."