This is my kind of thinking as well. While we may not be the only life in the universe, I imagine we’re not exactly a common occurrence. Uncommon enough that they have the slightest interest in keeping us from not existing lol. And when I say “us” I mean life in general on earth, not specifically humans. It would be a fair solution for an advanced species to remove humanity if it meant other life gets to live, and that’s unsettling.